1. Department of Community Health, Faculty of Public Health, Ubon Ratchathani Rajabhat University, Ubon Ratchathani, Thailand
2. Department of Animal Sciences, Faculty of Agriculture, Ubon Ratchathani Rajabhat University, Ubon Ratchathani, Thailand
3. Department of Public Health, Faculty of Health and Sports Science, Thaksin University, Phatthalung, Thailand
4. Department of Community Health, Champasak Health Science College, Champasak, Laos
5. Department of Disease Control, Champasak Provincial Public Health Office, Champasak, Laos
6. Department of Biological Science, The University of Tulsa, Tulsa, Oklahoma, USA