[1] Charite Univ Med Berlin, Clin Res Ctr Hair & Skin Sci, Klin Dermatol Venerol & Allergol, Charitepl 1, D-10117 Berlin, Germany
[2] Univ Klinikum Dusseldorf, Wundmanagement, Dusseldorf, Germany
[3] Asklepios Klinikum Hamburg Harburg, Abt Gefass & Endovaskulare Chirurg, Wundcentrum, Hamburg, Germany
[4] Univ Klinikum Essen, Klin Dermatol Venerol & Allergol, Essen, Germany