1 Department of Dermatology, Hôpital L'Archet 2, Nice.
2 Department of Dermatology, Hôpital Saint Eloi, Montpellier.
3 Department of Dermatology, Bonnet Hospital, Fréjus.
4 Department of Dermatology, Hôpital de la Timone, Marseille.
5 Department of Dermatology, CHRU de Tours.
6 Department of Dermatology, CHRU de Brest.
7 Department of Dermatology, CHU La Réunion Saint-Pierre.
8 Department of Pathology, Hôpital Pasteur, Nice.
9 Department of Dermatology, Hôpital L'Archet 2, Nice; Department of Pathology, INSERM U1065 Team 12, C3M, Nice. Electronic address: passeron@unice.fr.