1. The Danish Twin Registry, Danish Ageing Research Centre; University of Southern Denmark; Odense Denmark
2. Department of Endocrinology and Metabolism; Odense University Hospital; Odense Denmark
3. Department of Clinical Cell Biology; Vejle Hospital; Vejle Denmark
4. Department of Endocrinology and Internal Medicine, Tage-Hansens Gade (THG); Aarhus University Hospital; Aarhus Denmark
5. Department of Nuclear Medicine; Gentofte Hospital; Copenhagen Denmark
6. Department of Clinical Biochemistry and Pharmacology; Odense University Hospital; Odense Denmark
7. Department of Clinical Genetics; Odense University Hospital; Odense Denmark