1. Department of Dermatology and Reference Centre for Genodermatoses and Rare Skin Diseases (MAGEC); Université Paris Descartes - Sorbonne Paris Cité; INSERM U1163; Institut Imagine; Paris France
2. Department of Dermatology; University Hospital; Besançon France
3. Department of Paediatric Haematology and Oncology; University Hospital; Angers France
4. Department of Paediatric Haematology and Oncology; Robert Debré Hospital; Paris France
5. Department of Hematology; AP-HP; Necker-Enfants Malades Hospital; Hôpital Universitaire Necker-Enfants Malades; Paris France