1. School of Biosciences, University of Nottingham, Sutton Bonington, UK
2. Department of Chronic Diseases and Metabolism, Laboratory of Clinical and Experimental Endocrinology, Leuven, KU, Belgium
3. Department of Endocrinology, University Hospitals Leuven, Leuven, Belgium
4. Department of Obstetrics, Gynaecology and Andrology, Albert Szent-Gyorgy Medical University, Szeged, Hungary
5. Department of Medicine, Santiago de Compostela University, Complejo Hospitalario Universitario de Santiago (IDIS), CIBER de Fisiopatología Obesidad y Nutricion (CB06/03), Instituto Salud Carlos III, Santiago de Compostela, Spain
6. Endocrinology and Andrology Unit, “Mario Serio" Department of Experimental and Clinical Biomedical Sciences, University of Florence, Florence, Italy
7. Centre for Epidemiology Versus Arthritis, The University of Manchester & NIHR Manchester Biomedical Research Centre, Manchester University NHS Foundation Trust, Manchester, UK
8. Andrology Clinic, Tartu University Hospital, and Institute of Clinical Medicine, and Institute of Biomedicine and Translational Medicine, University of Tartu, Tartu, Estonia
9. Department of Andrology and Reproductive Endocrinology, Medical University of Łódź, Łódź, Poland
10. Department of Geriatrics, University Hospitals Leuven, and Department of Public Health and Primary Care, KU Leuven, Leuven, Belgium
11. Department of Endocrinology, Manchester University NHS Foundation Trust, Manchester, UK
12. Institute of Reproductive and Developmental, Department of Metabolism, Digestion and Reproduction, Imperial College London, Hammersmith Campus, London, UK
13. School of Veterinary Medicine and Science, University of Nottingham, Sutton Bonington, UK