[1] Harvard Med Sch, Brigham & Womens Hosp, Heart & Vasc Ctr, Div Cardiovasc Med,Dept Med, Boston, MA 02115 USA
[2] Massachusetts Gen Hosp, Div Rheumatol Allergy & Immunol, Boston, MA 02114 USA
[3] Brigham & Womens Hosp, Dept Radiol, 75 Francis St, Boston, MA 02115 USA
[4] Brigham & Womens Hosp, Div Rheumatol Immunol & Allergy, 75 Francis St, Boston, MA 02115 USA
[5] NYU, Sch Med, Dept Med, Ctr Prevent Cardiovasc Dis, New York, NY 10003 USA