1. Division of Cardiovascular Disease; University of Missouri Hospital and Clinics; Columbia Missouri USA
2. Division of Cardiovascular Diseases, Cardiovascular Research Institute; University of Kansas Hospital and Medical Center; Kansas City Kansas USA
3. Montefiore Medical Center; Bronx New York USA
4. Texas Cardiac Arrhythmia Center; Austin Texas USA
5. Beijing Anzhen Hospital; Capital Medical University; Beijing China
6. Arizona Heart Rhythm Institute; Phoenix Arizona USA
7. Texas Heart Institute; Houston Texas USA