1. From the Pennington Biomedical Research Center, Baton Rouge, LA (GAB); the George Washington Biostatistics Center, Rockville, MD (KAJ); the Department of Medicine, University of Washington, Seatlle, WA (WYF); the Department of Family and Preventive Medicine, School of Medicine, University of California San Diego, La Jolla, CA (EBC); the University of Texas Health Science Center at San Antonio, Sa