1. Sexual Medicine and Andrology Unit; Department of Experimental Clinical and Biomedical Sciences “Mario Serio”; University of Florence; Florence Italy
2. Division of Musculoskeletal and Dermatological Sciences; Faculty of Biology, Medicine and Health; Arthritis Research UK Centre for Epidemiology; Manchester Academic Health Science Centre; University of Manchester and NIHR Manchester Musculoskeletal Biomedical Research Centre; Manchester University NHS Foundation Trust; Manchester UK
3. Andrology Research Unit; Division of Endocrinology, Diabetes & Gastroenterology; Domain of Cardiovascular, Metabolic and Nutritional Sciences; School of Medical Sciences; Faculty of Biology, Medicine and Health; Manchester Academic Health Science Centre; The University of Manchester; Manchester UK
4. Department of Obstetrics, Gynaecology and Andrology; Albert Szent-György Medical University; Szeged Hungary
5. Department of Medicine; Santiago de Compostela University; Complejo Hospitalario Universitario de Santiago (CHUS)
6. CIBER de Fisiopatologia Obesidad y Nutricion (CIBERobn); Instituto Salud Carlos III; Santiago de Compostela Spain
7. Endocrine Unit; Department of Experimental Clinical and Biomedical Sciences “Mario Serio”; University of Florence; Florence Italy
8. Department of Clinical Biochemistry; University Hospital of South Manchester; Wythenshawe, Manchester UK
9. Reproductive Medicine Centre; Malmö University Hospital; University of Lund; Malmö Sweden
10. Institute of Cardiovascular Research; Royal Holloway, University of London; Egham UK
11. Department of Andrology and Reproductive Endocrinology; Medical University of Lodz; Lodz Poland
12. Department of Human Nutrition; University of Glasgow; Glasgow UK
13. Division of Neuroscience and Experimental Psychology; School of Biological Sciences; Faculty of Biology, Medicine and Health; Manchester Academic Health Science Centre Hope Hospital; Salford UK
14. Andrology Unit; United Laboratories of Tartu University Clinics; Tartu Estonia
15. Laboratory of Clinical and Experimental Endocrinology; Department of Chronic Diseases, Metabolism and Ageing; Katholieke Universiteit Leuven; Leuven Belgium
16. Gerontology and Geriatrics; Department of Chronic diseases, Metabolism and Ageing; Katholieke Universiteit Leuven; Leuven Belgium
17. Department of Surgery and Cancer; Institute of Reproductive and Developmental Biology; Imperial College London; London UK