1 Department of Rheumatology, Hospital Egas Moniz, Centro Hospitalar Lisboa Ocidental, Lisbon, Portugal. Electronic address: mariahelena.lourenco27@gmail.com.
2 Adolescent and Young Adult Hematology Unit, Saint-Louis Hospital, Assistance publique-Hôpitaux de Paris, institut de recherche Saint-Louis, université Paris Cité, Paris, France.
3 Inserm U1132 Bioscar, université Paris Cité, 75010 Paris, France; Department of Rheumatology & Reference Center for Rare Bone Diseases, Assistance publique-Hôpitaux de Paris, Lariboisière Hospital, 75010 Paris, France.