1. Department of Urology (S.K.H., N.L., H.W.), University of Washington, Seattle, Washington 98195
2. Department of Surgery/Urology (J.H.), University of Utah, Salt Lake City, Utah 84112
3. Departments of Urology (A.V.S., R.L.D.), Ann Arbor, Michigan 48109
4. Biostatistics Center (P.A.C., B.H.B.), George Washington University, Washington DC 20052
5. Department of Medicine (P.G.), Yale University, New Haven, Connecticut 06520
6. Internal Medicine (C.M., W.H.H.), Ann Arbor, Michigan 48109
7. Epidemiology (W.H.H.), University of Michigan, Ann Arbor, Michigan 48109