1 Laboratory of Genetics of Skin Diseases, INSERM U1163, Institut Imagine, Paris, France; Université de Paris, Paris, France; Department of Dermatology, APHP Hôpital Saint-Louis, Paris, France. Electronic address: herve.bachelez@aphp.fr.
2 Laboratory of Genetics of Skin Diseases, INSERM U1163, Institut Imagine, Paris, France; Université de Paris, Paris, France; Department of Dermatology, APHP Hôpital Saint-Louis, Paris, France.