[1] UCL Inst Child Hlth, Dept Infect Inflammat & Rheumatol, London, England
[2] Great Ormond St Hosp NHS Fdn Trust, London, England
[3] Hosp Univ Vaudois, Unite Romande Rhumatol Pediat, Lausanne, Switzerland
[4] Univ Hosp Tuebingen, Tubingen, Germany
[5] Clin Univ St Luc, Brussels, Belgium
[6] Catholic Univ Louvain, Brussels, Belgium
[7] Novartis Pharma AG, Basel, Switzerland
[8] Novartis Pharmaceut, E Hanover, NJ USA
[9] Novartis Pharmaceut, Beijing, Peoples R China
[10] Univ Toronto, Hosp Sick Children, Toronto, ON, Canada