[1] Chiang Mai Univ, Res Inst Hlth Sci, Chiang Mai, Thailand
[2] Sigia, Porto, Portugal
[3] Inst Rech Dev IRD, Montpellier, France
[4] Associated Med Sci AMS PHPT Res Collaborat, Chiang Mai, Thailand
[5] Chiang Mai Univ, Fac Med, Dept Pathol, Chiang Mai, Thailand
[6] Chiang Kham Hosp, Obstet & Gynecol Dept, Phayao, Thailand
[7] Prov Hosp, Dept Internal Med, Phayao, Thailand
[8] Nakornping Hosp, Dept Internal Med, Chiang Mai, Thailand
[9] Mahasarakam Hosp, Mahasarakam, Thailand
[10] Mae Chan Hosp, Chiang Rai, Thailand
[11] Inst Demog Studies Ined, Mortal Hlth & Epidemiol Dept, Aubervilliers, France
[12] Sorbonne Univ, Inst Pierre Louis Epidemiol & Sante Publ, INSERM, IPLESP, Paris, France
[13] Ctr Hosp Annecy Genevois, Clin Trial Unit, Epagny Metz Tessy, France