1. Department of Dermatology; Hôpital Sud; University of Amiens; 80054 Amiens France
2. Department of Dermatology; Hôpital Tenon; Assistance Publique-Hôpitaux de Paris (AP-HP); University of Paris X; 75020 Paris France
3. Department of Epidemiology and Public Health; Hôpital Nord; University of Amiens; 80054 Amiens France
4. Department of Vascular Rehabilitation; Hôpital Corentin-Celton; AP-HP; 92133 Issy-les-Moulineaux CEDEX France
5. Department of Dermatology and Gerontology; Hôpital Rothschild; AP-HP; University of Paris VI; 75571 Paris France
6. Department of Dermatology; Hôpital Bon-Secours; 57038 Metz France
7. Department of Dermatology; Centre Léon-Bérard; 69373 Lyon CEDEX 08 France
8. Department of Dermatology; Centre Hospitalier de Valence; 26953 Valence France
9. Department of Dermatology; Hôpital Charles-Nicolle; University of Rouen; 76038 Rouen France