[1] Cho Ray Hosp, Cardiovasc Ctr, Ho Chi Minh City, Vietnam
[2] 108 Mil Cent Hosp, Hanoi, Vietnam
[3] Bach Mai Hosp, Hanoi, Vietnam
[4] Vietnam Natl Canc Hosp, Hanoi, Vietnam
[5] Oncol Hosp Ho Chi Minh City, Ho Chi Minh, Vietnam
[6] Cho Ray Hosp, Ho Chi Minh, Vietnam
[7] Thong Nhat Hosp, Cardiol, Ho Chi Minh, Vietnam
[8] Natl Lung Hosp, Hanoi, Vietnam
[9] Hanoi Med Univ, Dept Oncol, Hanoi, Vietnam