1. Department of DermatologyAssistance Publique–Hôpitaux de Paris (APHP), Henri‐Mondor Hospital 94010 Créteil France
2. EA 7379 EpiDermEUniversité Paris Est Créteil Val de Marne UPEC Créteil France
3. Reference Center for toxic bullous diseases and severe drug reactions Créteil France
4. Regional Center of PharmacovigilanceAPHP, Pitié‐Salpêtrière Hospital Paris France
5. Dermatology DepartmentAPHP, Avicenne Hospital Bobigny France
6. Pathology DepartmentAPHP, Avicenne Hospital Bobigny France
7. Université Paris 13 Bobigny France
8. Department of DermatologyRouen University Hospital Rouen France
9. Drug Allergy Unit‐CCR2A, Department of Allergy and Clinical ImmunologyCHU Lyon‐Sud Pierre Benite France
10. Department of DermatologyLe Mans Hospital Le Mans France
11. Department of DermatologyBordeaux University Hospital Bordeaux France
12. Department of Dermatology, APHP, Bichat Claude Bernard HospitalParis Diderot University
13. Department of DermatologyUniversity Hospital of Lille Lille France
14. Department of ImmunologyAPHP, Bichat Claude Bernard Hospital Paris France
15. Department of DermatologyDijon University Hospital Dijon France
16. Department of Dermatology and AllergologyAPHP, Tenon Hospital Paris France
17. Sorbonne UniversitéFaculté de Médecine Sorbonne Université Paris France
18. Inserm, UMR 1135 Paris France
19. Regional Center of PharmacovigilanceUniversity Hospital Jean Minjoz Besançon France