1. Texas Cardiac Arrhythmia Institute, St. David’s Medical Center , 3000 N. I-35, Suite 720, Austin, TX 78705 , USA
2. Department of Electrophysiology, Harvard Medical School , 90 Blossom Street, Boston, MA 02114 , USA
3. Interventional Electrophysiology, Scripps Clinic , 3000 N. I-35, Suite 720, San Diego, CA 78705 , USA
4. Department of Internal Medicine, Metro Health Medical Center, Case Western Reserve University School of Medicine , 3000 N. I-35, Suite 720, Cleveland, OH 78705 , USA