[1] Boston Univ, Boston, MA 02215 USA
[2] NHLBI, Framingham Study, Framingham, MA USA
[3] Boston Univ, Sch Med, Sect Prevent Med & Epidemiol, Dept Epidemiol, Boston, MA 02118 USA
[4] Boston Univ, Sch Med, Sect Cardiovasc Med, Dept Epidemiol, Boston, MA 02118 USA
[5] Boston Univ, Sch Publ Hlth, Sect Prevent Med & Epidemiol, Dept Epidemiol, Boston, MA 02118 USA
[6] Boston Univ, Sch Publ Hlth, Sect Cardiovasc Med, Dept Epidemiol, Boston, MA 02118 USA