1. From the Departments of Epidemiology, Biostatistics, and Nutrition, Harvard School of Public Health; Channing Laboratory and Division of Preventive Medicine, Department of Medicine, Brigham and Women's Hospital; Center for Molecular Oncologic Pathology, Dana-Farber Cancer Institute, Boston, MA; and the Department of Pathology and Laboratory Medicine, Weill Medical College, Cornell University, New York, NY.