1. Division of Diabetes, Endocrinology and Metabolism, Imperial College London, London, UK
2. Department of Endocrinology, University Hospital of Odense & institute of Clinical Research, University of Southern Denmark, 5000 Odense C, Denmark
3. Faculty of Health and Medical Sciences, Department of Cellular and Molecular Medicine, University of Copenhagen, 2200 Copenhagen N, Denmark
4. Department of Endocrinology, Imperial College Healthcare NHS Trust, London, UK
5. Endocrine Bone Unit, Imperial College Healthcare NHS Trust, London, UK