1. 1Internal Medicine – Endocrinology, University Hospital Arhus, Aarhus, Arhus, Denmark
2. 2Internal Medicine and Clinical Nutrition, University of Gothenburg, Sahlgrenska University Hospital, Gothenburg, Sweden
3. 3Division of Metabolism, Endocrinology and Diabetes, University of Michigan Medical School, Domino Farms, Ann Arbor, Michigan, USA