[1] Boston Univ, Sch Med, Whitaker Cardiovasc Inst, Boston, MA 02118 USA
[2] Boston Univ, Sch Med, Evans Mem Dept Med, Boston, MA 02118 USA
[3] Boston Univ, Sch Med, Dept Prevent Med, Boston, MA 02118 USA
[4] Boston Univ, Sch Publ Hlth, Dept Epidemiol & Biostat, Boston, MA 02118 USA
[5] NHLBI, Framingham Study, Framingham, MA USA