1 Department of Medicine, Cleveland Clinic Fairview Hospital, Cleveland, OH, USA.
2 Department of Medicine, New York Medical College at St. Michael Medical Center, Newark, NJ, USA; Department of Cardiovascular Medicine, Mayo Clinic, Phoenix, AZ, USA.
3 Department of Medicine, SUNY Upstate Medical University, Syracuse, NY, USA.
4 Texas Cardiac Arrhythmia Institute, Dallas, TX, USA.
5 Department of Cardiovascular Medicine, Mayo Clinic, Phoenix, AZ, USA.
6 Department of Cardiovascular Medicine, Cleveland Clinic, Cleveland, OH, USA.
7 Department of Cardiovascular Medicine, Cleveland Clinic, Cleveland, OH, USA. Electronic address: LEEJ67@ccf.org.