1 Department of Dermatology, UMCG Center of Expertise for Blistering Diseases, University of Groningen, University Medical Center Groningen, Groningen, the Netherlands.
2 Section of Dermatology, Department of Health Sciences, University of Florence, Florence, Italy.
3 Dermatology Unit, ASST Papa Giovanni XXIII Hospital, Bergamo, Italy.
4 Division of Dermatology, Outpatient Consultation for Rare Diseases, Trento, Italy.
5 Faculty of Medicine, Papageorgiou General Hospital, 2nd Dermatology Department, Autoimmune Skin and Bullous Diseases Unit, Aristotle University, Thessaloniki, Greece.
6 Faculty of Medicine, Department of Dermatology, Akdeniz University, Antalya, Turkey.
7 Faculty of Medicine, Department of Dermatovenereology and Clinic of Dermatovenereology, University Clinical Center of Serbia, University of Belgrade, Belgrade, Serbia.
8 I. Department of Dermatovenereology, St. Anna Hospital, Masaryk University, Brno, Czech Republic.
9 Dermatology Unit, Fondazione IRCCS Ca' Granda Ospedale Maggiore Policlinico, Milan, Italy.
10 Department of Dermatology, Technical University Dresden, University Hospital, Dresden, Germany.
11 Department of Dermatology, Ospedale classificato Cristo Re, Rome, Italy.
12 Department of Dermatology and Allergology, Hannover Medical School, Hannover, Germany.
13 Dermatology Unit, Fondazione IRCCS Ca' Granda Ospedale Maggiore Policlinico, and Department of Pathophysiology and Transplantation, Università Degli Studi di Milano, Milan, Italy.
14 Molecular and Cell Biology Laboratory, IDI-IRCCS, Rome, Italy.
15 Department of Dermatology, University of Lübeck, Lübeck, Germany.
16 Department of Dermatology, University of Iowa, Iowa City, Iowa, USA.
17 Department of Dermatology, Universitat de Barcelona, Hospital Clínic de Barcelona, Barcelona, Spain.
18 Department of Dermatology and Lübeck Institute of Experimental Dermatology (LIED), University of Lübeck, Lübeck, Germany.