1. Department of Cardiology, University of Medicine and Pharmacy, Hue University, 6 Ngo Quyen, Hue City 530000, Vietnam
2. Department of Cardiology, Vietnam Heart Institute, 1 Ton that Tung, Hanoi 100000, Vietnam
3. Department of Cardiology, Vinh Medical School, 161 Nguyen Phong Sac, Vinh 460000, Vietnam
4. Department of Cardiology, Qui Nhon Hospital, 106 Nguyen Hue, Qui Nhon 820000, Vietnam
5. Department of Administration, Phu Yen Health Service, 4 To Huu, Phu Yen 620000, Vietnam
6. Department of Cardiology, Daklak Hospital, 2 Mai Hac De, Ban Me Thuot 630000, Vietnam
7. Department of Cardiology, Can Tho Medical and Pharmacy University, 179 Nguyen Van Cu, Can Tho 900000, Vietnam
8. Department of Cardiology, Hue Central Hospital, 16 Le Loi, Hue 530000, Vietnam
9. Department of Administration, Lam Dong Health Service, 6 Tran hung Dao, Dalat 670000, Vietnam
10. Department of Administration, Nha Trang Health Service, 3 Han Thuyen, Nha Trang 650000, Vietnam
11. Imperial Clinical Trials Unit, Imperial College London, Stadium House, 68 Wood Lane, London W12 7RH, UK
12. Department of Primary Care and Public Health, Imperial College London, St Dunstan’s Road, London W6 8RP, UK