[1] Univ Zurich, Zurich, Switzerland
[2] Fdn Policlin Univ A Gemelli, IRCSS, Rome, Italy
[3] Univ Cattolica Sacro Cuore, Rome, Italy
[4] IRCCS Ctr Cardiol Monzino, Milan, Italy
[5] Cardioctr Ticino, Heart Surg Unit, Lugano, Switzerland
[6] Univ Hosp San Raffaele, Milan, Italy