1. Departments of 1Internal Medicine and Endocrinology and
2. Clinical Pharmacology, Aarhus University Hospital, Aarhus;
3. Molecular Physiology Group, Department of Exercise and Sport Sciences, University of Copenhagen, Copenhagen;
4. Magnetic Resonance Research Centre, Aarhus University Hospital, Aarhus, Denmark; and
5. Joslin Diabetes Center and Department of Medicine, Brigham and Women's Hospital and Harvard Medical School, Boston, Massachusetts