[1] Hamburg Ctr Pediat & Adolescent Rheumatol, Hamburg, Germany
[2] Univ Barcelona, Hosp St Joan de Deu, Barcelona, Spain
[3] Emory Univ, Sch Med, Atlanta, GA USA
[4] Rigshosp, Copenhagen, Denmark
[5] Univ Klinikum Hamburg Eppendorf, Klin & Polyklinikum Augenheilkunde, Hamburg, Germany
[6] Semmelweis Univ, Dpt Pediat 2, Unit Paediat Rheumatol, Budapest, Hungary
[7] GOS, London, England
[8] German Rheumatism Res Ctr, Epidemiol Unit, Berlin, Germany
[9] Univ Vita Salute, San Raffaele Sci Inst, Dept Ophthalmol, Milan, Italy
[10] Anna Meyer Childrens Hosp, Pediat Rheumatol, Florence, Italy
[11] Univ Duisberg Essen, St Franziskus Hosp Muenster, Dept Ophthalmol, Munster, Germany