1. ANZAC Research Institute and Andrology Laboratory (C.M.A., M.H., S.S., J.S., A.K., M.J., D.J.H.), Department of Medicine, University of Sydney, New South Wales 2006, Australia
2. Department of Physiology (M.P., J.L., I.H.), University of Turku, 20520 Turku, Finland
3. Department of Reproductive Medicine (P.I.), Westmead Hospital, University of Sydney, New South Wales 2145, Australia