1. Department of Dermatology and Referral Center for Autoimmune Bullous Diseases, Groupe Hospitalier Paris Seine‐Saint‐Denis AP‐HP and University Paris 13 Bobigny France
2. Autoimmune Bullous Diseases Unit, 2nd Department of Dermatology Aristotle University School of Medicine, Papageorgiou General Hospital Thessaloniki Greece
3. Department of Dermatology and Venereology, Medical Center University Hospital Freiburg Freiburg Germany
4. Department of Health Sciences, Section of Dermatology, Azienda USL Toscana Centro, Rare Diseases Unit, European Reference Network‐Skin Member University of Florence Florence Italy
5. Department of Dermatology Hospital Sant Joan de Deu Barcelona Spain
6. Department of Dermatology University of Bern, Inselspital Berne Switzerland
7. Division of Dermatology, Department of Internal Medicine University of Kansas Medical Center Kansas City Kansas USA
8. Division of Dermatology, Department of Medicine National University Hospital Singapore Singapore
9. Department of Dermatology, Lübeck Institute of Experimental Dermatology (LIED) University of Lübeck Lübeck Germany
10. Department of Dermatology and Venereology University Hospital "Alexandrovska", Medical University‐Sofia Sofia Bulgaria
11. Department of Dermatology, Venereology and Allergology University Hospital Würzburg Würzburg Germany
12. Department of Dermatology University Hospital, Technical University Dresden Dresden Germany
13. Department of Dermatology, Allergy and Dermatosurgery Helios University Hospital Wuppertal, University Witten‐Herdecke Wuppertal Germany
14. 1st Department of Dermatology Aristotle University School of Medicine, Hospital of Skin and Venereal Diseases Thessaloniki Greece
15. Department of Dermatology Rouen University Hospital, INSERM 1234, Normandie University Rouen France
16. Department of Dermatology and Venereology, University Hospital Centre Zagreb, School of Medicine University of Zagreb Zagreb Croatia
17. Dermatology Unit Fondazione IRCCS Ca' Granda Ospedale Maggiore Policlinico Milan Italy
18. Department of Pathophysiology and Transplantation Università degli Studi di Milano Milan Italy
19. Departments of Dermatology and Pediatrics at Columbia University Medical Center Vagelos College of Physicians and Surgeons New York New York USA
20. Department of Dermatology, St George Hospital University of New South Wales Sydney New South Wales Australia
21. Department of Dermatology, Venereology and Dermatooncology Semmelweis University Budapest Hungary
22. Department of Dermatology and Allergy University Hospital, LMU Munich Germany
23. St John's Institute of Dermatology Guy's and St Thomas' NHS Foundation Trust London UK
24. Centre for Host‐Microbiome Interactions King's College London Faculty of Dentistry, Oral & Craniofacial Sciences London UK
25. Department of Dermatovenereology, Faculty of Medicine University of Belgrade Belgrade Serbia
26. Department of Dermatology Akdeniz University Faculty of Medicine Antalya Turkey
27. Genodermatosis Unit, Translational Pediatrics and Clinical Genetics Research Division Bambino Gesù Children's Hospital, IRCCS Rome Italy