1. Department of Community Medicine, Faculty of Medicine, Ramathibodi Hospital, Mahidol University, Rama VI Road, Rajdevi, Bangkok 10400, Thailand
2. National Health Examination Survey Office, Nonthaburi, Nonthaburi 11000, Thailand
3. College of Public Health Sciences, Chulalongkorn University, Bangkok 10330, Thailand
4. Faculty of Medicine, Khon Kaen University, Khon Kaen 40002, Thailand
5. Epidemiology Unit, Faculty of Medicine, Prince of Songkla University, Songkhla 90110, Thailand
6. Ramathibodi School of Nursing, Faculty of Medicine, Ramathibodi Hospital, Bangkok 10400, Thailand
7. Department of Medicine, Faculty of Medicine, Ramathibodi Hospital, Bangkok 10400, Thailand
8. Department of Medicine, Faculty of Medicine, Chulalongkorn University, Bangkok 10330, Thailand
9. Faculty of Medicine, Chiang Mai University, Chiang Mai 50002, Thailand