[1] San Giovanni Battista Hosp, Intervent Cardiol Dept, Turin, Italy
[2] ERASMUS MC, Intervent Cardiol Dept, Thoraxctr, Rotterdam, Netherlands
[3] Univ Ferrara, Inst Cardiol, I-44100 Ferrara, Italy
[4] Ist Sci San Raffaele, Intervent Cardiol Dept, Milan, Italy
[5] Massachusetts Gen Hosp, Intervent Cardiol Dept, Boston, MA 02114 USA
[6] Univ Hosp, Dept Cardiol 1, Bern, Switzerland
[7] Osped Civile Legnano, Intervent Cardiol Dept, Legnano, Italy