1. Division of Diabetology & Endocrinology, Philipps University, Marburg, Germany,
2. Department of Bone Oncology and Endocrinology, Northwest Hospital, Frankfurt am Main, Germany,
3. Institute of Cultural and Social Anthropology, Philipps University, Marburg, Germany,
4. Institute of Medical Biometry and Epidemiology, Philipps University, Marburg, Germany,
5. Department of Surgery, Asklepios Hospital, Weißenfels, Germany, and
6. Faculty of Medicine, University of Namibia, Windhoek, Namibia