1. From the Center for American Indian Health Research, College of Public Health, University of Oklahoma Health Sciences Center, Oklahoma City (E.T.L., W.W., Y.Z., J.Y.); MedStar Research Institute, Washington, DC (B.V.H.); Missouri Breaks Industries Research, Inc, Timber Lake, SD (T.K.W., L.G.B.); University of Arizona, Tucson (J.M.G.); Epidemiology and Biometry Program, National Heart, Lung, and Blood Institute, Bethesda, Md (R.R.F.); and Weill Medical College, Cornell University, New York, NY (R.B.D.).