1. Department of Hematology and Oncology University Hospital CEITEC Masaryk University Brno Czech Republic
2. Department of Internal Medicine I Division of Hematology and Hemostaseology Ludwig Boltzmann Institute for Hematology and Oncology Medical University of Vienna Vienna Austria
3. Institute of Biostatistics and Analyses, Ltd. Spinoff Company of Masaryk University Brno Czech Republic
4. Department of Allergology University Medical Center Groningen University of Groningen Groningen the Netherlands
5. Department of Allergology Medical University of Gdańsk Gdańsk Poland
6. Department of Dermatology, Venereology and Allergology Medical University of Gdańsk Gdańsk Poland
7. Division of Allergy Department of Dermatology University of Basel Basel Switzerland
8. Department of Dermatology University of Cologne Cologne Germany
9. Department of Medicine Section of Hematology University of Verona Verona Italy
10. Division of Hematology Department of Medicine Stanford University School of Medicine/Stanford Cancer Institute Stanford CA USA
11. Division of Hematology Fondazione IRCCS Policlinico San Matteo & University of Pavia Pavia Italy
12. Pediatric Dermatology Unit Department of Medicine University of Padova Padova Italy
13. Department of Hematology, Oncology and Stem Cell Transplantation Medical Center Faculty of Medicine University of Freiburg Freiburg Germany
14. Hämatologie und Onkologie III. Medizinische Klinik Universitätsmedizin Mannheim Universität Heidelberg Mannheim Germany
15. Allergy Unit Verona University Hospital Verona Italy
16. Department of Dermatology and Allergy Biederstein School of Medicine Technical University of Munich Munich Germany
17. Division of Allergy and Clinical Immunology University of Salerno Salerno Italy
18. Division of Hematology Istanbul Medical School University of Istanbul Istanbul Turkey
19. Department of Medical Sciences Uppsala University Section of Hematology Uppsala University Hospital Uppsala Sweden
20. Department of Oncology, Haematology, Haemostaseology and Stem Cell Transplantation University Hospital RWTH Aachen Aachen Germany
21. Department of Internal Medicine IV University Hospital Halle Halle Germany
22. Department of Dermatology and Venereology Kepler University Hospital Johannes Kepler University Linz Austria
23. Departement of Hematology Centre National de Référence des Mastocytoses Imagine Institute INSERM U1123 Université Paris Descartes Sorbonne, Paris Cité Hôpital Necker Assistance Publique des Hôpitaux de Paris (APHP) Paris France
24. Laboratory of Hematology Pitié‐Salpêtrière Hospital Paris France
25. Department of Internal Medicine 3, Hematology and Oncology Kepler University Hospital Johannes Kepler University Linz Austria
26. Faculty of Medicine and Health Sciences Department of Immunology‐Allergology‐Rheumatology University of Antwerp and Antwerp University Hospital Antwerp Belgium
27. Department of Dermatology and Venereology Medical University of Graz Graz Austria
28. Department of Hematology University Medical Center Groningen University of Groningen Groningen the Netherlands