[1] Fdn IRCCS Ca Granda Osped Maggiore Policlin, Dept Cardiothorac Vasc Area, I-20154 Milan, Italy
[2] Univ Milan, San Paolo Hosp, Dept Hlth Sci, Div Cardiol, I-20133 Milan, Italy
[3] Univ Milan, Dept Clin Sci & Community Hlth, I-20133 Milan, Italy
[4] Fdn Poliambulanza, Cardiothorac Dept Unit, I-25100 Brescia, Italy