1. Department of Internal Medicine I, Gastroenterology, Hepatology, Endocrinology and MetabolismMedical University of Innsbruck Innsbruck Austria
2. Department of Diabetes, Endocrinology, Clinical Nutrition and Metabolism, InselspitalBern University Hospital, University of Bern Bern Switzerland
3. Division of Endocrinology and Diabetology, Department of Internal MedicineMedical University of Graz Graz Austria
4. Department of Internal Medicine, Endocrinology and DiabetologyMedical University of Graz Graz Austria