From the Departments of Epidemiology and Biostatistics and Urology, University of California, San Francisco, San Francisco, CA; Department of Preventive Medicine, Feinberg School of Medicine, Northwestern University, Evanston, IL; and the Departments of Nutrition and Epidemiology, Harvard School of Public Health and Channing Laboratory, Department of Medicine, Brigham and Women's Hospital and Harvard Medical School, Boston, MA (2005-11-10時点)