Affiliation: | 1. Division of Heart Disease and Stroke Prevention, NCCDPHP/CDC, Atlanta, Georgia 30341‐3717, U.S.A.;2. Department of Biostatistics, University of California, Los Angeles, California 90095‐1772, U.S.A.;3. Division of Biostatistics, University of Minnesota, Minneapolis, Minnesota 55455, U.S.A. |