1. Faculty of Public Health, Department of Occupational Health and Safety, Mahidol University, Center of Excellence on Environmental Health and Toxicology, Commission on Higher Education, Ministry of Education, Bangkok, Thailand
2. Department of Epidemiology, Faculty of Public Health, Mahidol University, Bangkok, Thailand
3. Thai Public Health Nurses Association, Faculty of Public Health, Mahidol University, Bangkok, Thailand
4. Department of Public Health Nursing, Faculty of Public Health, Mahidol University, Bangkok, Thailand
5. Faculty of Health Sciences, Siam Technology College, Bangkok, Thailand
6. Department of Public Health, University of Massachusetts Lowell, Lowell, MA, USA