Affiliation: | 1. Interdisciplinary Vein Center, HELIOS Klinikum Wuppertal, , Germany;2. Department of Dermatology, Universit?t Witten/Herdecke, HELIOS Klinikum Wuppertal, , Germany;3. Department of Vascular Surgery, Universit?t Witten/Herdecke, HELIOS Klinikum Wuppertal, , Germany |