1. Division of Cardiology, Rajavithi Hospital Collage of Medicine Rangsit University Bangkok Thailand
2. Department of Cardiovascular Medicine Virginia Commonwealth University Richmond Virginia USA
3. Division of Cardiovascular Medicine Loma Linda University Health Loma Linda California USA
4. Internal Medicine Residency Program, Bassett Healthcare Network Cooperstown New York USA
5. Division of Cardiology University of Utah Health Salt Lake City Utah USA