1. Center for Diabetes Research, Gentofte Hospital; University Copenhagen; Hellerup Denmark
2. NNF Center for Basic Metabolic Research and Department of Biomedical Sciences, Faculty of Health and Medical Sciences; University Copenhagen; Copenhagen Denmark
3. Department of Endocrinology and Metabolism, Amsterdam Medical Centre; University of Amsterdam; Amsterdam The Netherlands
4. Department of Clinical Biochemistry; University Copenhagen, Rigshospitalet; Copenhagen Denmark