1. Department of Dermatology; Nantes University Hospital; Nantes; France
2. Department of Dermatology; Aarhus University Hospital; Aarhus; Denmark
3. Department of Dermatology; UZ Brussels; Vrije Universiteit Brussel; Brussels; Belgium
4. Department of Dermatology; Rady Children's Hospital; San Diego; California
5. Department of Dermatology; Bambino Gesù Children's Hospital; I.R.C.C.S; Rome; Italy
6. Department of Anesthesia, Intensive Care, and Dermatological Sciences; Fondazione Ca' Granda Ospedale Maggiore Policlinico; Milan; Italy
7. Department of Psychosomatic Medicine-Psychodermatology; University of Giessen; Giessen; Germany
8. Department of Dermatology; Children's Memorial Hospital; Chicago; Illinois
9. Department of Dermatology; St. Justine University Hospital; Montreal; Quebec; Canada
10. Department of Dermatology; University Hospital; Katholieke Universiteit Leuven; Leuven; Belgium
11. Department of Dermatology; Hospital del Nino Jesus; Madrid; Spain