1. Department of Occupational Health and Safety, Mahidol University Faculty of Public Health, Bangkok, Thailand
2. Center of Excellence on Environmental Health and Toxicology, Bangkok, Thailand
3. Department of Biostatistics, Mahidol University Faculty of Public Health, Bangkok, Thailand
4. Department of Occupational Health and Safety, Faculty of Public Health, Naresuan University, Phitsanulok, Thailand
5. Department of Health, Ministry of Public Health, Bureau of Elderly Health, Nonthaburi, Thailand
6. Department of Public Health, Zuckerberg College of Health Sciences, University of Massachusetts Lowell, Lowell, USA