1. Division of Cardiovascular Diseases, Cardiovascular Research Institute; University of Kansas Hospital & Medical Center; Kansas City KS USA
2. Division of Cardiovascular Disease; University of Missouri Hospital & Clinics; Columbia MO USA
3. Mid-America Cardiology, Bloch Heart Rhythm Center; University of Kansas Hospital & Medical Center; Kansas City KS USA
4. Electrophysiology Section; Albert Einstein College of Medicine at Montefiore Medical Center; Bronx NY USA
5. Texas Cardiac Arrhythmia Institute at St. David's Medical Center; Austin TX USA
6. Division of Cardiovascular Medicine; Loyola University Medical Center; Chicago IL