Céline Marsaud1, Isabelle Marie2, Isabelle Koné-Paut2. 1. Department of Pediatric Rheumatology and Division of Pediatrics, CEREMAI, University of Paris SUD, Bicêtre Hospital, Assistance Publique Hôpitaux de Paris, Le Kremlin Bicêtre, Paris, France. celine.marsaud@bct.aphp.fr. 2. Department of Pediatric Rheumatology and Division of Pediatrics, CEREMAI, University of Paris SUD, Bicêtre Hospital, Assistance Publique Hôpitaux de Paris, Le Kremlin Bicêtre, Paris, France.