[1] St Davids Med Cntr, Texas Cardiac Arrhythmia Inst, Austin, TX USA
[2] Akron Gen Med Cntr, Akron, OH USA
[3] Scripps Clin, San Diego, CA USA
[4] Calif Pacific Med Ctr, Sutter Hlth, San Francisco, CA USA
[5] Cntr Cardiol Monzino, Cardiac Arrhythmia Rsch Cntr, Milan, Italy