1. Department of Diabetes, Endocrinology, Nutritional Medicine and Metabolism, Inselspital, Bern University Hospital, University of Bern, Bern, Switzerland.
2. Division of Clinical Pharmacy and Epidemiology, Department of Pharmaceutical Sciences, University of Basel, Basel, Switzerland.
3. Stoffwechselpraxis, Stoffwechselzentrum Hirslanden Clinic St. Anna, Lucerne, Switzerland.
4. Department of Anaesthesiology and Pain Medicine, Inselspital, Bern University Hospital, University of Bern, Bern, Switzerland.
5. Department of Endocrinology, Diabetology and Clinical Nutrition, University Hospital Zurich (USZ) and University of Zurich (UZH), Zurich, Switzerland.
6. Department of Visceral Surgery, Hirslanden Clinic Beau-Site, Bern, Switzerland.
7. Department of Visceral Surgery, Lindenhofspital, Bern, Switzerland.
8. Department of Visceral Surgery and Medicine, Inselspital, Bern University Hospital, University of Bern, Bern, Switzerland.
9. Department of Clinical Chemistry, University Hospital Zurich, University of Zurich, Zurich, Switzerland.
10. Department of Information Engineering, University of Padova, Padova, Italy.
11. Department of Nephrology and Hypertension, Inselspital, Bern University Hospital, University of Bern, Bern, Switzerland.
12. Laboratory of Biometry, University of Thessaly, Nea Ionia/Volos, Magnesia, Greece.
13. Department of Clinical Chemistry, Inselspital, Bern University Hospital, University of Bern, Bern, Switzerland.
14. Department of Endocrinology, Diabetes and Metabolism, University Hospital Basel, Basel, Switzerland.