| Affiliation: | 1. Medical Faculty, Department of Visceral, Vascular and Endocrine Surgery, Martin Luther University Halle-Wittenberg, Halle (Saale), University of Duisburg-Essen, Essen, Germany;2. Medical Faculty, Department of Visceral, Vascular and Endocrine Surgery, Martin Luther University Halle-Wittenberg, Halle (Saale), University of Duisburg-Essen, Essen, Germany Department of General, Visceral and Transplantation Surgery, Section of Endocrine Surgery, University of Duisburg-Essen, Essen, Germany |
