[1] Univ Cattolica Sacro Cuore, Rheumatol, Rome, Italy
[2] Univ Leeds, Rheumatol, London, England
[3] Novartis Pharma AG, Immunol & Rheumatol, Basel, Switzerland
[4] Hosp Fdn Jimenez Diaz & Autonoma Univ, Dept Rheumatol & Joint & Bone Res Unit, Madrid, Spain
[5] Med Univ Vienna, Div Rheumatol, Vienna, Austria
[6] Ghent Univ Hosp, Dept Rheumatol, Ghent, Belgium
[7] Charles Univ Prague, Inst Rheumatol, Prague, Czech Republic
[8] Charles Univ Prague, Dept Rheumatol, Prague, Czech Republic
[9] Hosp Italiano Buenos Aires & Univ Inst, Rheumatol Unit, Internal Med Serv, Buenos Aires, DF, Argentina
[10] PSOAPS Psoriasis Clin & Res Ctr, Dermatol Country, Guadalajara, Mexico
[11] Novartis Healthcare Pvt Ltd, Clin Project Management, Hyderabad, India
[12] Novartis Healthcare Pvt Ltd, Biostat, Hyderabad, India
[13] Novartis Pharmaceut, Biostat, East Hanover, NH USA
[14] FAU Erlangen Nurnberg & Univ Klinikum Erlangen, Dept Internal Med 3, Erlangen, Germany
[15] Vrije Univ, Amsterdam UMC, Dept Epidemiol & Data Sci, Amsterdam, Netherlands