[1] Univ Manchester, Manchester Royal Infirm, Manchester Acad Hlth Sci Ctr, Dev & Regenerat Biomed Res Grp,Androl Res Unit, Manchester M13 9WL, Lancs, England
[2] Univ Manchester, Manchester Acad Hlth Sci Ctr, Arthrit Res UK Epidemiol Unit, Manchester M13 9PT, Lancs, England
[3] Katholieke Univ Leuven, Dept Expt Med, Div Gerontol & Geriatr, B-3000 Louvain, Belgium
[4] Katholieke Univ Leuven, Dept Expt Med, Ctr Musculoskeletal Res, B-3000 Louvain, Belgium
[5] Katholieke Univ Leuven, Dept Androl & Endocrinol, B-3000 Louvain, Belgium
[6] Katholieke Univ Leuven, Dept Expt Med, B-3000 Louvain, Belgium
[7] Albert Szent Gyorgyi Med Univ, Dept Obstet Gynaecol & Androl, H-6725 Szeged, Hungary
[8] Univ Santiago de Compostela, CHUS, Dept Med, Santiago De Compostela 15076, Spain
[9] Inst Salud Carlos III, CIBER Fisiopatol Obesidad & Nutr CB06 03, Santiago De Compostela 15076, Spain
[10] Univ Florence, Dept Clin Physiopathol, Androl Unit, I-50019 Florence, Italy
[11] Lund Univ, Malmo Univ Hosp, Reprod Med Ctr, SE-20506 Lund, Sweden
[12] Royal Free Hosp, Royal Free & Univ Coll Hosp Med Sch, Dept Endocrinol, London NW3 2QG, England
[13] Univ London Imperial Coll Sci Technol & Med, Dept Reprod Biol, London W12 0HS, England
[14] Med Univ Lodz, Dept Androl & Reprod Endocrinol, PL-90419 Lodz, Poland
[15] Univ Glasgow, Dept Human Nutr, Glasgow G12 8QQ, Lanark, Scotland
[16] Univ Manchester, Salford Royal Hosp, Sch Community Based Med, Salford M6 8HD, Lancs, England
[17] Tartu Univ Clin, United Labs, Androl Unit, EE-50406 Tartu, Estonia