[1] Univ Palermo, Dept Cardiol, I-90133 Palermo, Italy
[2] Univ Roma La Sapienza, Serv Cardiol, Dept Physiopatol, Rome, Italy
[3] Cannizzaro Hosp, Dept Cardiol, Catania, Italy
[4] Charles Univ Prague, Fac Med 1, Gen Univ Hosp, Dept Internal Cardiovasc Med 2, Prague, Czech Republic
[5] St Marianna Univ, Sch Med, Dept Internal Med, Div Cardiol, Kawasaki, Kanagawa, Japan