1. From the Department of Urology, Northwestern University, Chicago, Illinois, Center for Clinical Epidemiology and Biostatistics, University of Pennsylvania School of Medicine and Temple University, Philadelphia, Pennsylvania, University of Maryland, Baltimore and Division of Kidney, Urologic and Hematologic Diseases, National Institutes of Health/National Institute of Diabetes and Digestive and Kidney Diseases, Bethesda, Maryland, University of California-Los Angeles, Los Angeles, California, Harvard...