[1] Boston Univ, Sch Med, Boston, MA 02215 USA
[2] NHLBI, Framingham Heart Study, Bldg 10, Bethesda, MD 20892 USA
[3] Boston Univ, Sch Publ Hlth, Boston, MA 02215 USA
[4] Dept Neurol, San Antonio, TX USA
[5] Glenn Biggs Inst AlzheimerS & Neurodegenerat Dis, San Antonio, TX USA