1. Cleveland Clinic Foundation, Cleveland, Ohio, University of Alabama at Birmingham, Birmingham, Alabama, Conception-Center for Human Reproduction and University of Caxias Do Sul, Caxias Do Sul and Fundação Faculdade Federal de Ciências Médicas de Porto Alegre, Porto Alegre, Brazil, Dartmouth-Hitchcock Medical Center, Lebanon, New Hampshire, Urology Associates of Phoenix, Phoenix, Arizona, and University of Illinois at Chicago, Chicago, Illinois