1. Center for Reproductive Medicine, Baylor College of Medicine, Houston, Texas
2. Scott Department of Urology, Baylor College of Medicine, Houston, Texas
3. Department of Urology, Washington University in St. Louis, St. Louis, Illinois
4. Harvard Medical School, Boston, Massachusetts
5. South Texas Urology and Urologic Oncology, San Antonio, Texas
6. Department of Urology, University of South Florida Morsani College of Medicine, Tampa, Florida