1. Department of Dermatology Hôpital du Sacré Coeur Beirut Lebanon
2. Department of Dermatology Hôpital Henri Mondor Créteil France
3. Department of Dermatology Queen Elizabeth University Hospital Glasgow UK
4. c/o CochraneSkin Group The University of Nottingham Nottingham UK
5. Epidemiology in Dermatology and Evaluation of Therapeutics (EpiDermE) ‐EA 7379 Université Paris Est Créteil (UPEC) Créteil France