[1] Providence VA Med Ctr, Div Cardiovasc Med, Dept Internal Med, Providence, RI USA
[2] Brown Univ, Div Cardiovasc Med, Dept Internal Med, Alpert Med Sch, Providence, RI USA
[3] Univ Virginia, Sch Med, Dept Publ Hlth Sci, Charlottesville, VA 22908 USA
[4] Univ Calif Los Angeles, David Geffen Sch Med, Los Angeles, CA 90095 USA
[5] Tufts Univ, Dept Periodontol, Sch Dent Med, Boston, MA USA
[6] Harvard Med Sch, Brigham & Womens Hosp, Heart & Vasc Ctr, Boston, MA 02115 USA