作者单位:Univ Med & Pharm, Ho Chi Minh City, Vietnam[1]Univ Oxford, Nuffield Dept Med, Ctr Trop Med & Global Hlth, Oxford, England[2]Hosp Trop Dis, Ho Chi Minh City, Vietnam[3]Nguyen Trai Hosp, Ho Chi Minh City, Vietnam[4]Univ Oxford, Clin Res Unit, 764 Vo Kiet,Quan 5, Ho Chi Minh City, Vietnam[5]