1. Department of Dermatology Toulouse University Hôpital Larrey, 24 Chemin de Pouvourville Toulouse 31000 France
2. Modern Research Associates Dallas TX U.S.A.
3. Skin Centre for Dermatology Peterborough ON Canada
4. Centre de Recherche Dermatologique du Québec Métropolitain Québec QC Canada
5. Psoriasis Center at the Department of Dermatology University Medical Center Schleswig‐Holstein Campus Kiel Germany
6. University Hospital Germans Trias i Pujol Badalona Spain
7. Universidad Autónoma of Barcelona Barcelona Spain
8. Bakersfield Dermatology Bakersfield CA U.S.A.
9. Celgene Corporation Warren NJ U.S.A.
10. University of Verona Verona Italy
11. Tufts Medical Center Boston MA U.S.A.