[1] Hygeia Hosp, Dept Transcatheter Heart Valves, Athens 15123, Greece
[2] Mitera Childrens Hosp, Dept Pediat Cardiol, Athens, Greece
[3] Hygeia Hosp, Dept Cardiothorac Surg 2, Athens 15123, Greece
[4] Hygeia Hosp, Dept Anesthesiol, Athens 15123, Greece