[1] Univ Med Ctr Hamburg Eppendorf UKE, Inst Hlth Serv Res Dermatol & Nursing IVDP, Hamburg, Germany
[2] Polyclin Courlancy Bezannes, Dermatol Dept, Reims, France
[3] Univ Med Ctr Schleswig Holstein, Ctr Inflammatory Skin Dis, Dept Dermatol Venereol & Allergol, Campus Kiel, Kiel, Germany
[4] La Princesa Univ Hosp, Inst Invest Sanitaria La Princesa IIS IP, Madrid, Spain
[5] Med Univ Graz, Dept Dermatol & Venereol, Graz, Austria
[6] Univ Hosp Zurich, Dept Dermatol, Zurich, Switzerland
[7] Univ Zurich, Fac Med, Zurich, Switzerland
[8] Leeds Teaching Hosp NHS Trust, Leeds, W Yorkshire, England
[9] San Bortolo Hosp, Div Dermatol, Vicenza, Italy
[10] Catholic Univ Louvain, Clin Univ St Luc, Dept Dermatol, Brussels, Belgium
[11] Radboud Univ Nijmegen, Med Ctr, Radboudumc, Dept Dermatol, Nijmegen, Netherlands
[12] Int Federat Psoriasis Assoc, Stockholm, Sweden
[13] Almirall GMA, Barcelona, Spain
[14] Univ Med Ctr Schleswig Holstein, Psoriasis Ctr, Dept Dermatol, Campus Kiel, Kiel, Germany