1. Cardiology Department University of California San Diego La Jolla CA USA
2. Cardiovascular Center, Division of Cardiology, Department of Internal Medicine Seoul National University Bundang Hospital, Seoul National University College of Medicine Seoul Korea
3. Division of Cardiology, Department of Internal Medicine, School of Medicine Kyungpook National University Daegu Korea
4. Northwestern University Medical Center Chicago IL USA
5. Physics Department University of California Santa Barbara CA USA
6. Physics Department University of California San Diego La Jolla CA USA