Acknowledgements:
Contributors: AA-F, LR, and APG conceived and designed the study. AA-F and LR contributed to data collection and management. AA-F, MA-F contributed to the analysis and interpretation of the data, and the manuscript preparation. All authors reviewed and approved the final version of the manuscript. AA-F led the study and is the guarantor and the corresponding author. The corresponding author attests that all listed authors meet authorship criteria and that no others meeting the criteria have been omitted.
Funding: Nothing to declare
Acknowledgments: Nothing to acknowledge
Competing interests: All authors have completed the ICMJE uniform disclosure form at www.icmje.org/coi_disclosure.pdf and declare no external funding support. APG reports being the managing director for Endoscope-I company. No other relationships or activities that could appear to have influenced the submitted work.
Ethical approval: This was a retrospective observational study, and ethical approval was waived by our institution.
Data sharing: The data that support the findings of this study are available on request from the corresponding author.