Background-The SARS-CoV-2/ Covid-19 pandemic is still going on and globally healthcare

We demonstrate the effectiveness of readministering cetuximab as a salvage chemotherapeutic agent after nivolumab administration to a patient with a recurrence of cervical lymph node metastasis after tongue cancer surgery. We can infer that the immunostimulatory effect of nivolumab and reactivation of cetuximab enhance the antitumor effect of the therapy.

In the current report, we describe a case of immune-mediated TTP (iTTP) in a 62-year-old man manifesting as longstanding thrombocytopenia, recurrent cardioembolic strokes, and valvular thrombogenesis over a period of 3 years. We offer educational insights regarding the identification of atypical, chronic variants of iTTP.

In this manuscript, we conclude a comprehensive approach to a class of nonlinear coupled system of fractional differential equations with mixed type boundary value problem. Subsequently, the solution of coupled system exists and unique under mixed type boundary value conditions with the reference of Schaefer and Banach fixed-point theorems. Further, we developed the Hyers- Ulam stability for the considered problem. Finally, we set an example for the support of our results.

This case report illustrates an intervention using Dohsa-hou, a psychomotor therapy, for a girl with Kabuki syndrome and autism spectrum disorder. Although available evidence is limited, Dohsa-hou could be a treatment option for autism spectrum disorder associated with genetic disorders.

This work provides an analytical approach to characterize and determine solutions to a porous medium system of equations with views in applications to invasive-invaded biological dynamics. Firstly, the existence and uniqueness of solutions are proved. Afterwards, profiles of solutions are obtained making use of the selfsimilar structure that permits to show the existence of a diffusive front. The solutions are then studied within the Travelling Waves (TW) domain showing the existence of potential and exponential profiles in the stable connection that converges to the stationary solutions in which the invasive specie predominates. The TW profiles are shown to exist based on the geometry perturbation theory together with an analytical-topological argument in the phase plane. The finding of an exponential decaying rate (related with the advection and diffusion parameters) in the invaded specie TW is not trivial in the non-linear diffusion case and reflects the existence of a TW trajectory governed by the invaded specie runaway (in the direction of the advection) and the diffusion (acting along a finite speed front or support).

Background. This paper presents, for the first time, the Epidemic Volatility Index (EVI), a conceptually simple, early warning tool for emerging epidemic waves.  Methods. EVI is based on the volatility of the newly reported cases per unit of time, ideally per day, and issues an early warning when the rate of the volatility change exceeds a threshold.Results. Results from the COVID-19 epidemic in Italy and New York are presented here, while daily updated predictions for all world countries and each of the United States are available online.Interpretation. EVI's application to data from the current COVID-19 pandemic revealed a consistent and stable performance in terms of detecting oncoming waves. The application of EVI to other epidemics and syndromic surveillance tasks in combination with existing early warning systems will enhance our ability to act fast and optimize containment of outbreaks.

Objective: To explore the impact of dominant prolapse in other compartments in assessing bladder prolapse, and to establish cutoffs for staging bladder prolapse among Chinese women using translabial ultrasound. Design: Prospective multicentre observational study. Setting: Tertiary referral urogynaecology unit. Population: A total of 741 women with symptoms of lower urinary tract dysfunction and/or pelvic floor dysfunction were included. Methods: Women underwent interview, pelvic organ prolapse quantification (POP-Q) examinations and 4D translabial ultrasounds. Main outcome measures: The ROC statistic was used to assess accuracy and define the optimal cutoffs. Results: The mean patient age was 42.7 years (range, 18-82). There were 456 women without dominant prolapse in the apical/posterior compartments and 285 women with dominant prolapse in the apical/posterior compartments. Among patients without and with dominant prolapse, similar cutoffs (-10.9 mm vs. -9.1 mm) were determined for predicting POP-Q stage ≥ 2 in the anterior compartment, with AUCs of 0.87 and 0.79, respectively. In contrast, significantly different cutoffs (-5.7 mm vs. +3.5 mm) were determined for predicting POP-Q stage ≥ 1 among patients with and without dominant prolapse, with AUCs of 0.85 and 0.77, respectively. Conclusion: Dominant prolapse in the apical/posterior compartments affected the accuracy and cutoffs of translabial ultrasound for staging bladder prolapse. Thus, competition of various organs in women with multi-compartment prolapse should be considered as a potential complicating factor in assessing pelvic organ prolapse. Funding: The study is supported by grants from the National Natural Science Foundation of China (No. 91859115). Key words: Bladder prolapse; translabial ultrasound.

Objective: To assess the incidence of serious complications and reoperations for recurrence after pelvic organ prolapse (POP) surgery and compare the three most common types of repair. Design: Prospective cohort study using a registry. Setting: 19 surgical centres in France. Population: 2309 women participated between 2017 and 2019. Methods: a multivariate analysis including an inverse probability of treatment weighting approach was used to obtain three comparable groups. Main outcome measures: Serious complications and subsequent reoperations for POP recurrence Results: Mean follow-up was 16.6 months. Surgeries included in the analysis were native tissue vaginal repair (N=504), transvaginal mesh placement (692), and laparoscopic sacropexy with mesh (1113). Serious complications occurred among 52 women (2.3%), and reoperation for recurrence was required for 32 (1.4%). At one year, the cumulative weighted incidence of serious complications was 1.8% for native tissue vaginal repair (95% confidence interval 0-3.9), 3.9% for transvaginal mesh (2.0-5.9), and 2.2% for sacropexy (1.1-2.6). Compared with the native tissue vaginal repair group, the risk of serious complications was higher in the transvaginal mesh group (weighted-HR 3.84, 2.43-6.08), and the sacropexy group (2.48, 1.45-4.23), while the risk of reoperation for prolapse recurrence was reduced in both groups (transvaginal mesh [0.22, 0.13-0.39] and sacropexy [0.29, 0.18-0.47]). Conclusions: Laparoscopic sacropexy with mesh appears to have a better risk profile (few serious complications and few reoperations for recurrence) than transvaginal mesh placement (more serious complications) and native tissue vaginal repair (more reoperations for recurrence). These results are useful for informing women and for shared decision making.

The universality of linguistic taboo suggests that almost all languages have words and expressions that are regarded as unsuitable for general use; or themes and topics that are generally not supposed to be mentioned. Therefore, this paper explores the Igbo and Chinese linguistic taboos in cross-cultural communication based on the theories of context and cross-cultural communication. The main objective of this study is to explore all the linguistic taboos that exist in Chinese and Igbo language, and further unfold how to establish a healthy and efficient cross-cultural communication with others to reduce misunderstanding. A descriptive research design was adopted; the data collection was by personal observation (being an Igbo and have lived in China for 6 years), oral interview, and review of literature. Chinese linguistic taboos examined include taboos relating to death, numbers, appellation, eating, gender, sex/ sex organs, disease taboo, and excretion, while Igbo linguistic taboos are related to disease/calamity, dead/death, animals, religion, appellation, and sex/parts of the body. To help reduce or avoid the violation of Chinese or Igbo taboos and improve cross-cultural communication, there is great need to strengthen the study and accumulation of the target culture, gradually enhance the awareness and sensitivity of cultural differences, pay attention to the cultivation of cross-cultural thinking

Using data from five long-term field sites measuring soil moisture, we show the limitations of using soil moisture observations alone to constrain modelled hydrological fluxes. We test a land surface model, MESH/CLASS, with two configurations: one where the soil hydraulic properties are determined using a pedotransfer function (the texture-based calibration) and one where they are assigned directly (the hydraulic properties-based calibration). The hydraulic properties-based calibration outperforms the texture-based calibration in terms of reproducing changes in soil moisture storage within a 1.6 m deep profile at each site, but both perform reasonably well, especially in the summer months. When the models are constrained using observations of changes in soil moisture, the predicted hydrological fluxes are subject to very large uncertainties associated with equifinality. The uncertainty is larger for the hydraulic properties-based calibration, even though the performance was better. We argue that since the pedotransfer functions constrain the model parameters in the texture-based calibrations in an unrealistic way, the texture-based calibration underestimates the uncertainty in the fluxes. We recommend that reproducing observed cumulative changes in soil moisture storage should be considered a necessary but insufficient criterion of model success. Additional sources of information are needed to reduce uncertainties, and these could include improved estimation of the soil hydraulic properties and direct observations of fluxes, particularly evapotranspiration.

Investigating the changes in streamflow regimes is useful for understanding the mechanisms associated with hydrological processes in different watersheds and for providing information to facilitate water resources management. In this study, we selected three watersheds, i.e., Sandu River, Hulu River, and Dali River on the Loess Plateau, to examine the changes in the streamflow regimes and to determine their responses to different soil and water conservation measures (terracing, afforestation, and damming). The daily runoff was collected continuously by three hydrological gauges close to the outlets of the three watersheds from 1965 to 2016. The eco-surplus, eco-deficit, and degree of hydrological change were assessed to detect hydrological alterations. The Budyko water balance equation was applied to estimate the potential impacts of climate change and human activities on the hydrological regime changes. Significant decreasing trends (P < 0.05) were detected in the annual streamflow in the Sandu and Dali River watersheds, but not in the Hulu River watershed where afforestation dominated. The annual eco-surplus levels were low and they decreased slightly at three stations, whereas the eco-deficit exhibited dramatic increasing trends in the Sandu and Dali River watersheds. In the Sandu River watershed (dominated by terraces), the runoff exhibited the most significant reduction and the eco-deficit was the highest among the three watersheds. The integral degrees of hydrological change were higher in the Sandu River watershed than the other two watersheds, thereby suggesting substantial variations in the magnitude, duration, frequency, timing, and rate of change in the daily streamflow. In the Dali River watershed (dominated by damming), the changes in the extreme flow were characterized by a decreasing number appearing in high flow. In these watersheds, human activities accounted for 74.1% and 91.78% of the runoff reductions, respectively. In the Hulu River watershed (dominated by afforestation), the annual runoff exhibited an insignificant decreasing trend but with a significant increase in the low flow duration. Rainfall changes accounted for 64.30% of the runoff reduction.

Substantial progresses in protein structure prediction have been made by utilizing deep-learning and residue-residue distance prediction since CASP13. Inspired by the advances, we improve our CASP14 MULTICOM protein structure prediction system in three main aspects: (1) a new deep learning based protein inter-residue distance predictor (DeepDist) to improve template-free (ab initio) tertiary structure prediction, (2) an enhanced template-based tertiary structure prediction method, and (3) distance-based model quality assessment methods empowered by deep learning. In the 2020 CASP14 experiment, MULTICOM predictor was ranked 7th out of 146 predictors in protein tertiary structure prediction and ranked 3rd out of 136 predictors in inter-domain structure predic-tion. The results of MULTICOM demonstrate that the template-free modeling based on deep learning and residue-residue distance prediction can predict the correct topology for almost all template-based modeling targets and a majority of hard targets (template-free targets or targets whose templates cannot be recognized), which is a significant improvement over the CASP13 MULTICOM predictor. The performance of template-free tertiary structure prediction largely depends on the accuracy of distance pre-dictions that is closely related to the quality of multiple sequence alignments. The structural model quality assessment works reasonably well on targets for which a sufficient number of good models can be predicted, but may perform poorly when only a few good models are predicted for a hard target and the distribution of model quality scores is highly skewed.

In May 2020, the first outbreak of rabbit viral hemorrhagic disease (RHD) caused by rabbit hemorrhagic disease virus type 2 (GI.2) occurred in Sichuan, China. The acute onset and short disease course resulted in rabbit mortalities as high as 42.86%. Currently, basic research on the etiology and genetic characteristics of GI.2 is lacking in China. Pathological changes in various tissues from infected rabbits were investigated, and the viral genome was characterized. This study used RT-PCR, histopathology, scanning electron microscopy, and whole genome sequencing analysis to identify the pathogen in samples from infected rabbits that had died. RT-PCR identified the presence of GI.2. The histopathology revealed liver cell necrosis and hemorrhaging into lung alveoli. Electron microscopy demonstrated spherical GI.2 particles that were 40 nm in diameter with an isometric interior. The gene sequence length of the isolate was 7,464 bp and termed GI.2/CN/SC-04. The phylogenetic analysis of the GI.2 genotype showed that the strain from GI.2/CN/SC-04 clustered into a separate group compared to the isolate from China (MT586027.1). Phylogenetic analysis based on whole sequences and showed that GI.2/CN/SC-04 strains were identical and clustered with other strains of GI.2 circulating globally. The results of recombination analysis showed that GI.2/CN/SC-04 was recombined from MT586027.1 strain (main parent strain) and MN90145.1(secondary parent strain), and both the two recombination breakpoints 2858-5137nt. This was the study to report that GI.2 had been isolated in China, to characterise the full genome sequence and provide phylogenetic insights into the origin of this exotic incursion. development.

Objective: To assess the general population’s knowledge regarding the utility and availability of tools to diagnosis endometriosis, with focus on ultrasound. Design: An international cross-sectional online survey study was performed between August and October 2019. Setting and Population: 5301 respondents, representing 73 countries. Methods: 23 questions survey focused on knowledge of endometriosis diagnosis distributed globally via patient- and community-endometriosis groups using social media. Main outcomes and measures: Descriptive data of the knowledge of diagnostic tools for diagnosing endometriosis, including details about diagnosis using ultrasound. Results: 84.0% of respondents had been previously diagnosed with endometriosis, 71.5% of which were diagnosed at the time of surgery. Ultrasound and MRI were the methods of diagnosis in 6.5% and 1.8%, respectively. 91.8%, 28.8%, and 16.6% of respondents believed surgery, ultrasound and MRI could diagnose endometriosis, respectively (more than one answer allowed). In those diagnosed by surgery, 21.7% knew about ultrasound as a diagnosis method compared to 51.5% knowing in those diagnosed non-surgically (p<0.001). 14.7%, 31.1%, and 18.2% stated superficial, ovarian, and deep endometriosis could be diagnosed with ultrasound (32.9% stated they did not know which phenotypes of endometriosis could be diagnosed). 58.4% of respondents do not believe they could access an advanced ultrasound in their region. Conclusions: There are significant gaps in the understanding of diagnosing endometriosis using non-surgical tools in this study population.

A toy model for supply and demand is derived from the knowledge of the probability distribution for the prices that different agents consider fair for a certain good. The model obtained shows the expected characteristics of supply and demand curves and allows further development in market dynamics.

A 42-year-old male patient was diagnosed with coronavirus disease 2019. His symptoms improved 2 weeks after lopinavir therapy (400 mg every 12 hours). However, he was subsequently diagnosed with complete anosmia. Magnetic resonance brain imaging showed no abnormalities. We prescribed B-complex vitamins and olfactory training. Forty days later, he recovered.

In this paper, we study the large time behavior of a class of wave equation with a nonlinear dissipation in non-cylindrical domains. The result we obtained here relaxes the conditions for the nonlinear term coefficients (in precise, that is $\beta(t)|u|^\rho u$) in \cite{alb} and \cite{ha} (which require $\beta(t)$ to be a constant or $\beta(t)$ to be decreasing with time $t$) and has less restriction for the defined regions.

IntroductionSince the outbreak of COVID-19 there has been an unprecedented effort from the scientific community to develop tools to help tackle this crisis. According to the Foundation for Innovative New Diagnostics (FIND; 18 March 2021) there are 1025 commercialized SARS-CoV-2 assays currently available and an additional 98 in development, including 655 immunoassays and 437 molecular assays.1 Early in the pandemic, molecular testing using nucleic acid amplification tests (NAATs) became the pillar of COVID-19 diagnostics. Since then, the development of antigen tests, immunoassays, point-of-care, and centralized options means there are now choices to be made as to how, when, and where to deploy these technologies and many guidelines have been developed, often based on Centers for Disease Control and Prevention (CDC) and World Health Organization (WHO) guidance.2-4 However, with the rapid emergence of new technologies and new scientific data, these guidelines are very fluid and subject to change. Furthermore, while NAATs are the most sensitive diagnostic tool for COVID-19 infection,3-5 the global demand for diagnostic testing is still such that the use of labour-intensive, specialist techniques needs to be carefully considered.The aim of this review is to provide an international evaluation of real-world testing needs and to define: settings where the ‘next best’ alternatives to NAATs are appropriate; settings where NAATs may not be the best option; how to manage antigen test results; and how to manage negative NAAT results where there is still a strong clinical suspicion of COVID-19. We will further aim to set out the key considerations for defining a testing strategy. Table 1 demonstrates that each testing strategy provides different information on infection status and has different performance metrics, so the right option for the right setting needs to be carefully assessed. Here we also discuss the common challenges facing clinicians and laboratorians when interpreting and supplying COVID-19 diagnostics and provide insights into what will be needed next.Table 1. A summary of the diagnostic testing methodologies for COVID-19.

RCN has attracted special attention in the field of WPT since it was put forward. A lot of research work has been done in rectifier basing on RCN for the purpose of increasing conversion efficiency. It is reported that many kinds of rectifier incorporating RCN which operate at various of circuit forms and physical forms are proposed. RCN and all kinds of modified versions are studied deeply in these paper, the rectifiers related to which are analyzed also. The results show that RCN only play the role of BPF in the rectifying circuit, which are not reaching the original idea of the first proposer.

Objective: To evaluate whether E7 mRNA can predict the risk of progression in women with HPV16 infection. Design: prospective observational study Setting: Tertiary university hospital Population: A cohort of 139 women referred to colposcopy for an abnormal screening result fulfilling the following inclusion criteria: 1) a positive test result confirming HPV16 infection; 2) a biopsy sample with a histological diagnosis of absence of lesion or low-grade SIL/CIN grade1 (LSIL/CIN1); 3) no previous HPV vaccination; 4) no pregnancy; and 5) no previous cervical treatments; and 6) no immunosuppression. Methods: At the first visit all women underwent a cervical sample for liquid-based cytology, HPV testing and genotyping, and HPV16 E7 mRNA analysis and a colposcopy with at least one colposcopy-guided biopsy. Follow-up visits were scheduled every six months. In each control a liquid-based Pap smear, HPV testing, as well as a colposcopy examination with biopsy if necessary were performed. Main outocome measures: Histological diagnosis of HSIL/CIN2+ at any time during follow-up Results: E7 mRNA expression was positive in 55/127 (43.3%) women included in the study and seven (12.7%) progressed to HSIL/CIN2+. In contrast, only 1/72 (1.4%) women with no HPV16 E7 mRNA expression progressed (p=0.027). HPV16 E7 mRNA expression was associated with a 10-fold increased risk of progression (HR 10.0; 95%CI 1.2-81.4). Conclusions: HPV16 E7 mRNA could be useful for risk stratification of women with HPV16 infection in whom a HSIL/CIN2+ has been ruled out.

Background: Dysregulation of eicosanoids is associated with asthma and a composite of oxylipins, including exhaled LTB4, characterizes childhood asthma. While FeNO has been used as the standard for monitoring steroid responsiveness, the potential utility of eicosanoids in monitoring the therapeutic outcomes remains unclear. We aimed to examine the levels of major eicosanoids representing different metabolic pathways in exhaled breath condensates (EBCs) of children with asthma during exacerbation and after treatment. Methods: Levels of 6 exhaled eicosanoid species in asthmatic children and healthy subjects were evaluated using ELISA. Results: In addition to those previously reported, including LTB4, the levels of exhaled 15-HETE, but not TXB2, showed significant difference between asthmatics (N=318) and healthy controls (N=97), particularly the severe group showed the lowest levels of exhaled 15-HETE. Receiver Operating Characteristic (ROC) analyses revealed similar distinguishing power for the levels of 15-HETE, FEV1 and FeNO, whilethe 15-HETE/LTB4 ratio was significantly lower in subjects with severe asthma (p<0.01). Analysis of asthmatics (N=75) during exacerbation and convalescence showed significant improvement in lung function (FEV1; p<0.001), but not FeNO, concomitant with significantly increased levels of 15-HETE (p<0.001) and reduced levels of TXB2 (p<0.05) after therapy, particularly for those who at the top 30% level during exacerbation. Further, decreased LTB4 and LXA4 at convalescence were noted only in those at the top 30 percentile during exacerbation. Conclusion: The exhaled 15-HETE was found to discriminate childhood asthma while decreased levels of exhaled TXB2 and increased levels of 15-HETE were prominent after treatment.

Background Some drugs used in the treatment of coronavirus disease 2019 (COVID-19) are likely to increase the risk of QT interval prolongation and related arrhythmias or death. Due to the low sensitivity of the reverse transcriptase-polymerase chain reaction (RT-PCR) test, chest computed tomography (CT) imaging is being used for COVID-19 diagnostic correlation and to evaluate whether there is pneumonic involvement in the lung. Objective In this study, we aimed to compare whether there was a difference in terms of QT interval prolongation and effect on heart rate in COVID-19 patients based on their chest CT findings and drug treatment regimes. Methods This was a single-center retrospective cohort study of non-intensive care unit (ICU) patients hospitalized . A total of 344 patients with a mean age of 46.34 ± 17.68 years were included in the study (56.1% men). Patients were divided into four groups according to their chest CT results as having typical, atypical, indeterminate, or no finding of pneumonic involvement. Mean QTc intervals and heart rates calculated from electrocardiograms at admission and after treatment were compared. Results There were no significant differences between groups with regards to age, gender, and body mass index (BMI). There were also no significant differences between the groups in terms of mean QTc interval values upon admission (p:0.127) or after treatment (p:0.205). Heart rate values were similar among the groups as well, with no significant differences in mean heart rate on admission (p:0.648) and post-treatment (p:0.229) ECGs. Conclusion This study has demonstrated finding of COVID-19 infection based on chest CT does not affect QT interval prolongation and bradycardia in non-ICU COVID-19 patients. There is a need for additional larger studies investigating the effect of chest CT findings on QT interval prolongation and bradycardia in COVID-19 patients.

Background: The aim of this study was to investigate the relationship between umbilical cord blood neutrophil gelatinase-associated lipocalin and neonatal diseases, such as acute kidney injury. Materials and Method: The neutrophil gelatinase-associated lipocalin levels were measured in umbilical cord blood of 180 babies born in the department of Obstetrics and Gynecology between 2015-2016. Patients were classified according to maternal diseases, neonatal diseases, and demographic features. The obtained data were compared with umbilical cord blood neutrophil gelatinase-associated lipocalin levels. Results: There was a statistically significant difference between umbilical cord blood NGAL levels and premature rupture of membranes (p<0.05), ABO incompatibility (p<0.05), meconium aspiration syndrome (p<0.001), ventricular septal defect (p<0.001), and breech presentation birth (p<0.001). Conclusion: neutrophil gelatinase-associated lipocalin can be useful as a diagnostic biomarker in the evaluation of maternal and neonatal diseases. However, further studies on larger patient populations are needed.