[1] Univ Hosp Heidelberg, Rheumatol, Heidelberg, Germany
[2] Tech Univ Dresden, Pediat, Med Fak Carl Gustav Carus, Dresden, Germany
[3] Univ Hosp Tuebingen, Inflammatory Dis, Ctr Interdisciplinary Rheumatol Immunol & Auto In, Tubingen, Germany
[4] Univ Hosp Tuebingen, Dept Internal Med 2, Tubingen, Germany
[5] Charite Univ Med Berlin, Div Pulmonol Immunol & Crit Care Med, Dept Pediat, Berlin, Germany
[6] Heinrich Heine Univ Dusseldorf, Div Pediat Rheumatol, Clin Pediat Hematol Oncol & Clin Immunol, Dusseldorf, Germany
[7] Hosp St Georg gGmbH Leipzig, ImmunoDeficiency Ctr Leipzig IDCL, Leipzig, Germany
[8] Univ Freiburg, Univ Hosp Med Ctr, Med Fac, Dept Pediat & Adolescent Med,Div Pediat Infect Di, Freiburg, Germany
[9] Univ Hosp Ulm, Dept Pediat, Ulm, Germany
[10] Novartis Pharma GmbH, IHD, Nurnberg, Germany
[11] Univ Hosp Tuebingen, Div Pediat Rheumatol, Dept Pediat, Tubingen, Germany