1. Department of Dermatology Center for Blistering Diseases European Reference Network‐Skin Member University Medical Center Groningen University of Groningen Groningen The Netherlands
2. Department of Dermatology, Inselspital Bern University Hospital Bern Switzerland
3. Dermatology Unit Fondazione IRCCS Ca’ Granda Ospedale Maggiore Policlinico Milan Italy
4. Department of Pathophysiology and Transplantation Università degli Studi di Milano Milan Italy
5. Academic Unit of Ophthalmology Birmingham & Midland Eye Centre University of Birmingham Birmingham UK
6. Department of Health Sciences Section of Dermatology AUSL Toscana Centro Rare Diseases Unit European Reference Network‐Skin Member University of Florence Florence Italy
7. Department of Oral Medicine Guy’s & St Thomas’ NHS Foundation Trust London UK
8. Department of Oral Medicine School of Dental Sciences Newcastle University Newcastle UK
9. Department of Dermatology and Referral center for Autoimmune Bullous Diseases Groupe Hospitalier Paris Seine‐Saint‐Denis AP‐HP and University Paris 13 Bobigny France
10. Department of Dermatology Ospedale Classificato Cristo Re Rome Italy
11. Department of Pathology University Medical Center Groningen University of Groningen Groningen The Netherlands
12. Department of Otorhinolaryngology Amsterdam University Medical Centers University of Amsterdam Amsterdam The Netherlands
13. Laboratory of Molecular and Cell Biology Istituto Dermopatico dell'Immacolata IDI‐IRCCS Rome Italy
14. Dermatology unit Department of Medicine and Surgery University Hospital University of Parma Parma Italy
15. Department of Ophthalmology Universitätsklinikum Düsseldorf Düsseldorf Germany
16. Department of Dermatology and Allergology Philipps‐Universität Marburg Germany
17. Department of Dermatology Rouen University Hospital Centre de Référence des Maladies Bulleuses Autoimmunes, and INSERM U1234 Normandie University Rouen France
18. Department of Oral Medicine Eastman Dental Institute University College London London UK
19. Department of Dermatology St George Hospital University of New South Wales Sydney NSW Australia
20. 2nd Department of Dermatology Autoimmune Bullous Diseases Unit Aristotle University School of Medicine Papageorgiou General Hospital Thessaloniki Greece
21. Department of Dermatology & Allergology University Medical Center Utrecht Utrecht The Netherlands
22. Department of Dermatology and Lübeck Institute of Experimental Dermatology (LIED) University of Lübeck Lübeck Germany
23. St John’s Institute of Dermatology Guy’s & St Thomas’ NHS Foundation Trust London UK
24. Centre for Host‐Microbiome Interactions Faculty of Dentistry Oral & Craniofacial Sciences King’s College London London UK
25. Genodermatosis Unit, Genetics and Rare Diseases Research Division Bambino Gesù Children’s Hospital IRCCS Rome Italy