1. Department of Internal Medicine; Division of Endocrinology; Diabetes and Metabolism; University Hospital Basel; Basel Switzerland
2. Division of Endocrinology; Diabetology and Metabolism; University Medical Clinic Aarau; Aarau Switzerland
3. Department of Internal Medicine; Division of Nephrology; Dialysis and Transplantation; University Medical Clinic Aarau; Aarau Switzerland
4. Institute of Laboratory Medicine; University Medical Clinic Aarau; Aarau Switzerland