[1] Univ Kebangsaan Malaysia, Fac Med, Dept Community Hlth, Kuala Lumpur 56000, Malaysia
[2] Univ Malaysia, Fac Med & Hlth Sci, Borneo Med & Hlth Res Ctr, Kota Kinabalu 88400, Sabah, Malaysia
[3] Minist Hlth, Sabah State Hlth Dept, Kota Kinabalu 88590, Malaysia
[4] Univ Malaysia Sabah, Fac Social Sci & Humanities, Kota Kinabalu 88400, Malaysia
[5] Johns Hopkins Ctr Commun Programs, Baltimore, MD USA
[6] Ehime Univ, Proteo Sci Ctr, Div Mol Parasitol, Toon, Ehime 7910295, Japan
[7] Univ Pittsburgh, Dept Behav & Community Hlth Sci, Sch Publ Hlth, Pittsburgh, PA 15261 USA
[8] Univ Malaysia Sabah, Fac Med & Hlth Sci, Dept Publ Hlth Med, Kota Kinabalu 88400, Malaysia
[9] Univ Malaysia Sabah, Fac Med & Hlth Sci, Dept Pathol & Microbiol, Kota Kinabalu 88400, Malaysia