1. Division of Haematology; Department of Internal Medicine I; Medical University of Vienna; Vienna Austria
2. Servicio Central de Citometria; Centro de Investigacion del Cancer (IBMCC; CSIC/USAL); IBSAL and Department of Medicine; University of Salamanca; Salamanca Spain
3. Department of Dermatology and Allergy Centre; Odense University Hospital; Odense Denmark
4. Department of Dermatology; University of Cologne; Cologne Germany
5. Norfolk and Norwich University Hospital; Norwich UK
6. Department of Dermatology and Allergy Biederstein; Technical University of Munich; Munich Germany
7. Department of Allergology; Medical University of Gdansk; Gdansk Poland
8. Department of Dermatology; Medical University of Gdansk; Gdansk Poland
9. Department of Allergology; University Medical Center of Groningen; University of Groningen; Groningen the Netherlands
10. Department of Pathology; Odense University Hospital; Odense Denmark
11. Division of Allergic Diseases; Mayo Clinic; Rochester MN USA
12. Division of Allergy and Clinical Immunology; University of Salerno; Salerno Italy
13. Instituto de Estudios de Mastocitosis de Castilla La Mancha (CLMast); Hospital Virgen del Valle; Toledo Spain
14. III. Medizinische Klinik; Universitäts-Medizin Mannheim; Universität Heidelberg; Mannheim Germany
15. Institute of Pathology; Ludwig-Maximilians-University; Munich Germany
16. Division of Haematology; Department of Internal Medicine; University of Istanbul; Istanbul Turkey
17. Department of Haematology; University Medical Center Groningen; University of Groningen; Groningen the Netherlands
18. Imagine Institute Université Paris Descartes, Sorbonne, Paris Cité; Centre national de référence des mastocytoses; Paris France
19. Department of Haematology; Guys and St Thomas' NHS Foundation Trust; Guys Hospital; London UK
20. Stanford Cancer Institute; Stanford University School of Medicine; Stanford CA USA
21. Department of Dermatology & Allergy; Charité Universitätsmedizin Berlin; Berlin Germany
22. Division of Rheumatology, Allergy & Immunology; Department of Internal Medicine; Virginia Common-wealth University; Richmond VA USA
23. Division of Allergy and Immunology; Department of Medicine; Brigham and Women's Hospital; Harvard Medical School; Boston MA USA
24. Laboratory of Allergic Diseases; NIAID; NIH; Bethesda MD USA
25. LBPA CNRS UMR8113; Ecole Normale Supérieure de Cachan; Cachan France