1. Departments of Andrology and Endocrinology (D.V.), B-3001 Leuven, Belgium
2. Laboratory Medicine (D.V., I.J., J.B.), B-3001 Leuven, Belgium
3. Arthritis Research UK Epidemiology Unit (S.R.P., T.W.O., D.M.L.), Manchester Academic Health Science Centre, The University of Manchester, Manchester M13 9PT, United Kingdom
4. Leuven University Division of Geriatric Medicine and Centre for Metabolic Bone Diseases (E.G., M.L., S.B.), B-3001 Leuven, Belgium
5. Leuven University Laboratory of Molecular Endocrinology (M.L., F.C.), Department of Molecular Cell Biology, Katholieke Universiteit Leuven, B-3001 Leuven, Belgium
6. Radiology and Manchester Academic Health Science Centre (J.E.A.), Manchester, United Kingdom
7. Medical Research Council Human Nutrition Research (K.A.W.), Elsie Widdowson Laboratory, Cambridge CB1 9NL, United Kingdom
8. Department of Obstetrics, Gynaecology, and Andrology (G.B.), Albert Szent-Gyorgy Medical University, H-6721 Szeged, Hungary
9. Department of Medicine (F.F.C.), Santiago de Compostela University, Complejo Hospitalario Universitario de Santiago, 15705 Santiago de Compostela, Spain, Centro de Investigación Biomédica en Red de Fisiopatologia Obesidad y Nutricion (CB06/03), Instituto Salud Carlos III, Santiago de Compostela, 28029 Madrid, Spain Manchester Royal Infirmary, Manchester M13 9WL, United Kingdom
10. Andrology Research Unit (J.D.F., F.C.W.W.), Developmental and Regenerative Biomedicine Research Group, The University of Manchester, Manchester Academic Health Science Centre, The Royal Infirmary, Manchester, United Kingdom
11. Andrology Unit (G.F.), Department of Clinical Physiopathology, University of Florence, 50121 Florence, Italy
12. Scanian Andrology Centre (A.G.), Department of Urology, Malmö University Hospital, University of Lund, SE-22 184 Lund, Sweden
13. Department of Endocrinology (T.S.H.), Royal Free and University College Hospital Medical School, Royal Free Hospital, Hampstead, London NW3 2Q United Kingdom
14. Department of Surgery and Cancer (I.T.H.), Imperial College London, Hammersmith Campus, London W12 ONN, United Kingdom
15. Department of Andrology and Reproductive Endocrinology (K.K.), Medical University of Lodz, 90-419 Lodz, Poland
16. Department of Human Nutrition (M.E.J.L.), University of Glasgow, Glasgow G12 8TA, Scotland, United Kingdom
17. School of Community-Based Medicine (N.P.), The University of Manchester, Salford Royal National Health Service Trust, Salford M6 8HD, United Kingdom
18. Andrology Unit (M.P.), United Laboratories of Tartu University Clinics, 50090 Tartu, Estonia