M.M. Malina - Charles University
R.L. Roumenina - Centre de Recherche des Cordeliers
B.P. Bordereau - Centre de Recherche des Cordeliers
S.C.P. Schmitt - German Center for Pediatric and Adolescent Rheumatology
M.A.M. Majid - Department of Pediatrics, Pediatric Nephrology Unit, Dubai, United Arab Emirates
J.A. Jankauskiene - Department of Pediatrics, Vilnius, Lithuania
S.T. Seeman - Charles University
H.-M.L. Halbwachs-Mecarelli - Hôpital Necker-Enfants Malades
F.-B.V. Fremeaux-Bacchi - Hôpital Européen Georges-Pompidou
S.F. Schaefer - German Center for Pediatric and Adolescent Rheumatology