[1] Ruhr Univ Bochum, St Josef Hosp, Dept Vasc Surg, D-44791 Bochum, Germany
[2] Ruhr Univ Bochum, St Josef Hosp, Dept Dermatol, D-44791 Bochum, Germany
[3] Praxis Chirurg & Phlebol, Magdeburg, Germany
[4] Mosel Eifel Klin, Bad Bertrich, Germany
[5] Praxis Dermatol & Phlebol, Freiburg, Germany
[6] Praxis Dermatol & Phlebol, Saarlouis, Germany
[7] Praxis Chirurg & Phlebol, Stade, Germany
[8] Artemed Fachklin, Munich, Germany