[1] Univ Toulouse 3, Serv Pharmacol Med & Clin, Equipe Pharmacoepidemiol, INSERM,UMR 1027, F-31062 Toulouse, France
[2] Wellcome Trust Res Unit, Lao Oxford Mahosot Hosp, Microbiol Lab Mahosot Hosp, Viangchan, Laos
[3] Univ Hlth Sci, Fac Postgrad Studies, Viangchan, Laos
[4] Minist Hlth, Food & Drug Dept, Viangchan, Laos
[5] Univ Oxford, Churchill Hosp, Ctr Trop Med, Oxford, England