1 CEREMAST, Imagine Institute, INSERM U1163, AP-HP, Necker-Children's Hospital, Paris Centre University, Paris, France.
2 Department of Hematology, Necker-Children's Hospital, AP-HP, Paris Centre University, Paris, France.
3 Department of Dermatology, Reference Center for Rare Skin disorders in Children, AP-HP, Necker-Children's Hospital, Paris Centre University, Paris, France.
4 Centre d'Investigation Clinique, Inserm CIC 1425, AP-HP, Bichat Hospital, Paris Centre University, Paris, France.
5 Centre de Recherche en Cancérologie de Marseille, INSERM U1068, Marseille, France.
6 Association Française pour les Initiatives de Recherche sur le Mastocyte et les Mastocytoses (AFIRMM), Marseille, France.