[1] ARNAS Civ Cristina Benfratelli, Dept Cardiac Electrophysiol, Palermo, Italy
[2] McGill Univ, McGill Univ Hlth Ctr, Div Cardiol, Montreal, PQ, Canada
[3] Texas Cardiac Arrhythmia Inst, St Davids Med Ctr, Austin, TX USA
[4] Intervent Electrophysiol Scripps Clin, San Diego, CA USA
[5] Case Western Reserve Univ, Sch Med, Metro Hlth Med Ctr, Dept Internal Med, Cleveland, OH USA
[6] Univ Milan, IRCCS, Ctr Cardiol Monzino, Dipartimento Sci Biochim Chirurg & Odontoiatr, Milan, Italy