[1] Harvard Univ, Massachusetts Gen Hosp, Sch Med, Dept Radiol,Cardiac MR PET CT Program, Boston, MA 02114 USA
[2] Boston Univ, Dept Math, Boston, MA 02215 USA
[3] Boston Univ, Dept Med, Boston, MA 02215 USA
[4] Boston Univ, Dept Neurol, Boston, MA 02215 USA
[5] NHLBI, Framingham Heart Study, Framingham, MA USA
[6] Fed Fdn Sch Med Sci Porto Alegre, Porto Alegre, RS, Brazil
[7] Harvard Univ, Massachusetts Gen Hosp, Sch Med, Div Cardiol, Boston, MA 02114 USA
[8] Brigham & Womens Hosp, Dept Med, Boston, MA 02115 USA