[1] Univ Coll London Hosp, Sch Med, Dept Endocrinol, London, England
[2] Univ Manchester, Manchester Acad Hlth Sci Ctr, Epidemiol Unit, Arthrit Res UK, Manchester, Lancs, England
[3] Univ Turku, Dept Physiol, Turku, Finland
[4] Albert Szent Gyorgyi Med Univ, Dept Obstet Gynaecol & Androl, H-6701 Szeged, Hungary
[5] Katholieke Univ Leuven, Leuven Univ Div Geriatr Med, Leuven, Belgium
[6] Katholieke Univ Leuven, Leuven Univ Ctr Metab Bone Dis, Leuven, Belgium
[7] Univ Santiago de Compostela, Dept Med, CIBER Fisiopatol Obesidad & Nutr CB06 03, Inst Salud Carlos III,CHUS, Santiago De Compostela, Spain
[8] Univ Manchester, Manchester Royal Infirm, Manchester Acad Hlth Sci Ctr, Dept Endocrinol, Manchester M13 9WL, Lancs, England
[9] Univ Florence, Dept Clin Physiopathol, Androl Unit, Florence, Italy
[10] Lund Univ, Malmo Univ Hosp, Dept Urol, Scanian Androl Ctr, Lund, Sweden
[11] Univ London Imperial Coll Sci Technol & Med, Dept Reprod Biol, London, England
[12] Med Univ Lodz, Dept Androl & Reprod Endocrinol, Lodz, Poland
[13] Univ Manchester, Hope Hosp, Manchester Acad Hlth Sci Ctr, Salford M6 8HD, Lancs, England
[14] Tartu Univ Clin, United Labs, Androl Unit, Tartu, Estonia
[15] Arthrit Res UK, Chesterfield, England
[16] Katholieke Univ Leuven, Leuven Univ Div Endocrinol, Louvain, Belgium
[17] Univ Glasgow, Dept Human Nutr, Glasgow, Lanark, Scotland