1. Faculty of Public Health, Khon Kaen University; Department of Biostatistics and Demography; Mitraparp Road Mueng District Khon Kaen Khon Kaen Thailand 40002
2. Monash University; School of Public Health & Preventive Medicine; The Alfred Centre 99 Commercial Road Melbourne Victoria Australia 3004
3. Department of Epidemiology and Preventive Medicine, School of Public Health and Preventive Medicine, Monash University; Monash Department of Clinical Epidemiology at Cabrini Hospital; Suite 41, Cabrini Medical Centre 183 Wattletree Road Malvern Victoria Australia 3144