[1] Columbia Univ, Dept Med, Med Ctr, Div Cardiol,Struct Heart & Valve Ctr, New York, NY 10032 USA
[2] Abbott NW Hosp, Minneapolis Heart Inst, Minneapolis, MN USA
[3] Houston Methodist Hosp, Div Cardiol, Houston, TX USA
[4] Carol Davila Univ Med & Pharm, Dept Cardiol, Bucharest, Romania
[5] Univ Padua, Dept Cardiac Thorac & Vasc Sci, Padua, Italy
[6] McGill Univ, Heart Ctr, Div Cardiol, Montreal, PQ, Canada
[7] Univ Milano Bicocca, Inst Auxol Italiano, S Luca Hosp, IRCCS, Milan, Italy