[1] Osped Niguarda Ca Granda, Dept Med & Rheumatol, I-20123 Milan, Italy
[2] Osped Niguarda Ca Granda, Dept Emergency Med, Milan, Italy
[3] Chaim Sheba Med Ctr, Cardiac Rehabil Inst, IL-52621 Tel Hashomer, Israel
[4] Univ Massachusetts, Sch Med, Dept Cardiovasc Med, Worcester, MA 01605 USA