1 Université de Paris, Laboratory of Genetic Skin Diseases, Institut Imagine, Paris, France; INSERM UMR 1163, Laboratory of Genetic Skin Diseases, Institut Imagine, Paris, France; Department of Dermatology, Hôpital Saint-Louis, APHP, Paris, France.
2 Université de Paris, Laboratory of Genetic Skin Diseases, Institut Imagine, Paris, France; INSERM UMR 1163, Laboratory of Genetic Skin Diseases, Institut Imagine, Paris, France; Department of Dermatology, Hôpital Saint-Louis, APHP, Paris, France. Electronic address: herve.bachelez@aphp.fr.