1. Département de Dermatologie, UF de Dermatologie Vasculaire; Assistance-Publique Hôpitaux de Paris, Hôspital Tenon; Paris France
2. Hautmedizin; Lüdenscheid Germany
3. Copenhagen Wound Healing Centre; Bispebjerg University Hospital; Copenhagen Denmark
4. Department of Clinical Medicine; The Department of Dermatology and Venereology; Aarhus Denmark