[1] Schon Klin Hamburg Eilbek, Hamburg Ctr Pediat & Adolescent Rheumatol, Hamburg, Germany
[2] German Rheumatism Res Ctr, Berlin, Germany
[3] Hosp 12 Octubre, Serv Reumatol, Madrid, Spain
[4] Hamburg Ctr Pediat & Adolescent Rheumatol, JSSc Collaborat Grp, Hamburg, Germany
[5] Spedali Civili Brescia, Serv Reumatol Allergol Immunol Clin, Brescia, Italy
[6] Univ Bari, Rheumatol Unit DiMIMP, Sch Med, Bari, Italy
[7] Cochin Hosp, Rheumatol Dpt A, Paris, France
[8] Rambam Hlth Care Campus, B Shine Rheumatol Unit, Haifa, Israel
[9] Krankenhaus St Josef, Rheumatol, Wuppertal, Germany
[10] Osped San Raffaele, Unit Immunol Rheumatol Allergy & Rare Dis UnIRAR, Milan, Italy
[11] Leiden Univ, Med Ctr, Dept Rheumatol, Leiden, Netherlands
[12] Vilnius Univ, State Res Inst Innovat Med, Vilnius, Lithuania
[13] CHU Bordeaux, Rheumatol Dept, Bordeaux, France
[14] St Vincents Univ Hosp, Dept Rheumatol, Dublin, Ireland
[15] Rikshosp Univ Hosp, Dept Rheumatol, Oslo, Norway
[16] Univ Politecn Marche, Ancona, Italy
[17] Azienda Osped Riuniti, Clin Med, Ancona, Italy
[18] Univ Hosp Zurich, Dept Rheumatol, Zurich, Switzerland