1. From the Division of Epidemiology and Community Health (T.O., E.S., A.R.F.), University of Minnesota, Minneapolis; Osaka Medical Center for Health Science and Promotion (T.O.), Osaka, Japan; the Departments of Biostatistics (L.E.C.) and Epidemiology (W.D.R.), University of North Carolina, Chapel Hill; and the Department of Medicine (T.H.M.), University of Mississippi Medical Center, Jackson.