[1] Univ Brescia, Dept Med & Surg Specialties Radiol Sci & Publ Hlt, Inst Cardiol, Brescia, Italy
[2] Brigham & Womens Hosp, Ctr Cardiovasc Dis Prevent, Cardiovasc Div, 75 Francis St, Boston, MA 02115 USA
[3] Brigham & Womens Hosp, Ctr Cardiovasc Dis Prevent, Div Prevent Med, 75 Francis St, Boston, MA 02115 USA
[4] Harvard Med Sch, Boston, MA 02115 USA