1. Center for Reproductive Medicine and Infertility (O.O., D.A.P., K.X., K.O.), Weill Medical College of Cornell University, New York, New York 10021
2. the Department of Urology (D.A.P.), Weill Medical College of Cornell University, New York, New York 10021
3. The Population Council, Center for Biomedical Research (D.A.P., A.M.), New York, New York 10021