1. Division of Endocrinology and Diabetology, Department of Medicine II, Medical Center – University of Freiburg, Faculty of Medicine, University of Freiburg, Freiburg, Germany
2. Institute of Human Genetics, Medical Faculty, University of Freiburg, Freiburg, Germany
3. General Practice and Family Medicine, Villingen-Schwenningen, Germany
4. Institute for Clinical Pathology, Medical Faculty, University of Freiburg, Freiburg, Germany