1. Division of Cardiology, Internal Medicine Department, University of Medicine and Pharmacy at Ho Chi Minh city, Ho Chi Minh city 700 000, Vietnam
2. Cardiology Department, Nhan Dan Gia Dinh Hospital, Ho Chi Minh city 700 000, Vietnam
3. Outpatient Department, University Medical Center, Ho Chi Minh city 700 000, Vietnam
4. University of Medicine and Pharmacy at Ho Chi Minh city, Ho Chi Minh city 700 000, Vietnam
5. Family Physician Training Center, University of Medicine and Pharmacy at Ho Chi Minh city, Ho Chi Minh city 700 000, Vietnam
6. Cardiology Department, Cho Ray Hospital, Ho Chi Minh city 700 000, Vietnam