1. Department of Endocrinology, Sahlgrenska University Hospital , SE-41345 Gothenburg , Sweden
2. Department of Internal Medicine and Clinical Nutrition, Institute of Medicine at Sahlgrenska Academy, University of Gothenburg , SE-41345 Gothenburg , Sweden
3. Wallenberg Center for Molecular and Translational Medicine, University of Gothenburg , SE-41345 Gothenburg , Sweden