Acknowledgements
We thank Anna Carabelli, MD (SD Allergologia Clinica, Azienda Ospedaliero-Universitaria Pisana, Pisa, Italy), Georg Klein, MD (Department of Dermatology, General Hospital Ordensklinikum Linz GmbH Elisabethinen, Linz, Austria), Antonia Kragten (Department of Dermatology, Venereology and Allergology, Medical University of Innsbruck, Innsbruck, Austria), José Julio Laguna, MD (Allergy Unit, Hospital Central de la Cruz Roja. Faculty of Medicine, Alfonso X El Sabio University, ARADyAL, Madrid, Spain), Carmen Moreno-Aguilar, MD (Maimonides Institute for research in Biomedicine of Cordoba (IMIBIC), Avenida Menéndez Pidal S/N, Córdoba, Spain and Unidad de Gestión Clínica de Inmunoalergia & ARADyAL research network, Reina Sofía University Hospital, Córdoba, Spain), Barbara Rogala, MD, PhD (Clinical Department of Internal Diseases, Dermatology, and Allergology, Medical University of Silesia, Zabrze, Poland), Cecilia Spina, MD (Haematology and Bone-Marrow Transplant Unit, Department of Medicine, Verona University, Verona, Italy), Ceyda Tunakan Dalgıç, MD (Department of Internal Medicine, Division of Allergy and Immunology, Medical Faculty, Ege University, Izmir, Turkey) as well as Daniella Winter, MD (Department of Dermatology, General Hospital Ordensklinikum Linz GmbH Elisabethinen, Linz, Austria) for their valuable help. The study was funded by the Medical University of Graz.