1 UCLA Cardiac Arrhythmia Center, UCLA Health System, David Geffen School of Medicine at UCLA, Los Angeles, California, USA; UCLA Cardiovascular Interventional Programs, Department of Medicine, UCLA Health System, David Geffen School of Medicine at UCLA, Los Angeles, California, USA. Electronic address: smori@mednet.ucla.edu.
2 UCLA Cardiac Arrhythmia Center, UCLA Health System, David Geffen School of Medicine at UCLA, Los Angeles, California, USA; UCLA Cardiovascular Interventional Programs, Department of Medicine, UCLA Health System, David Geffen School of Medicine at UCLA, Los Angeles, California, USA.
3 Section of Arrhythmia, Division of Cardiovascular Medicine, Department of Internal Medicine, Kobe University Graduate School of Medicine, Kobe, Japan.