University of Iowa, Iowa City, IA grademail@bsc.gwu.edu. Atlanta VA Medical Center, Decatur, GA. Emory University School of Medicine, Atlanta, GA. Diabetes Clinical Research Center, Massachusetts General Hospital, Harvard Medical School, Boston, MA. Kaiser Permanente Northwest, Portland, OR. Fair Haven Community Health Care, New Haven, CT. Case Western Reserve University, Cleveland, OH. University of Cincinnati, Cincinnati, OH. Baylor Research Institute, Dallas, TX. University of Alabama, Birmingham, AL. MedStar Health Research Institute, Hyattsville, MD. University of Michigan, Ann Arbor, MI. Southwestern American Indian Center, Phoenix, AZ. University of Colorado, Denver, CO. Department of Biostatistics and Bioinformatics, The Biostatistics Center, Milken Institute School of Public Health, The George Washington University, Rockville, MD.