1. Saint-Pierre University Hospital, Université Libre de Bruxelles (ULB); Department of Dermatology; 21 Boite 18 rue Gretry Brussels Belgium 1000
2. Université de Rennes 1; Department of Dermatology; 2 rue Henri le Guilloux Rennes France 35000
3. Université de Rennes 1; Clinical Investigation Center, CIC-P 0203, INSERM, Pharmacoepidemiology Unit; Rennes France
4. Hôpital Necker-Enfants malades; Department of Dermatology; 156 rue de Sèvre Paris France 75015
5. Université Paris Descartes; Paris France
6. The University of Nottingham; c/o Cochrane Skin Group; A103, King's Meadow Campus Lenton Lane Nottingham UK NG7 2NR
7. Université Paris Descartes; Biostatistics, INSERM UMRS872, Equip 22; 15 rue de l’Ecole de médecine Paris France 75006
8. Hôpital Henri Mondor; Department of Dermatology; 51 avenue du Général de Lattre de Tassigny Créteil France 94010