1. The Laboratories for Reproductive Biology (C.W.G., F.S.F.), , The University of North Carolina at Chapel Hill, Chapel Hill, North Carolina 27599
2. Pediatrics (C.W.G., F.S.F., P.Y., A.J.D.) , The University of North Carolina at Chapel Hill, Chapel Hill, North Carolina 27599
3. Departments of Surgery (Division of Urology) (D.K., J.L.M.), The University of North Carolina at Chapel Hill, Chapel Hill, North Carolina 27599
4. The Lineberger Comprehensive Cancer Center (A.J.D., J.L.M., F.S.F.), The University of North Carolina at Chapel Hill, Chapel Hill, North Carolina 27599
5. Department of Pathology, Case Western Reserve University, Cleveland, Ohio (T.G.P.)