Department of Dermatology, Reference Center for Genodermatoses and Rare Skin Diseases (MAGEC) hôpital universitaire Necker-Enfants malades, AP-HP, 149, rue de Sèvres, 75015 Paris, France; Cross-disciplinary Therapeutic Education Unit, hôpital universitaire Necker-Enfants malades, AP-HP, 149, rue de Sèvres, 75015 Paris, France.