[1] Rovigo Gen Hosp, Dept Cardiol, Rovigo, Italy
[2] Univ Ferrara, Sect Internal & Cardiopulm Med, Dept Med Sci, Ferrara, Italy
[3] Stanford Univ, Med Ctr, Div Vasc & Intervent Radiol, Stanford, CA 94305 USA
[4] Rovigo Gen Hosp, Dept Cardiovasc Diag & Endoluminal Intervent, Rovigo, Italy
[5] East Carolina Univ, Brody Sch Med, Inst Heart, Dept Cardiovasc Sci, Greenville, NC USA
[6] Alexandroska Univ Hosp, Cardiol Clin, Sofia, Bulgaria