1. EA 7379 EpiDermE Université Paris Est Créteil France
2. Department of Internal Medicine Hôpital Saint Louis, AP‐HP Paris France
3. Regional Center of Pharmacovigilance Hôpital Pitié‐Salpêtrière, AP‐HP Paris France
4. Department of Medical InformaticsHôpital Henri‐Mondor, AP–HP Créteil France
5. Department of Dermatology and Reference Center for Toxic Bullous Diseases Hôpital Henri‐Mondor, AP–HP Créteil France
6. INSERM Centre d'Investigation Clinique 1430 Créteil France