1. Graduate Program in Veterinary Science, Faculty of Veterinary Medicine, Chiang Mai University, Chiang Mai 50100, Thailand
2. Center of Elephant and Wildlife Health, Chiang Mai University Animal Hospital, Chiang Mai University, Chiang Mai 50100, Thailand
3. Faculty of Veterinary Medicine, Chiang Mai University, Chiang Mai 50100, Thailand
4. Research Center of Producing and Development of Products and Innovations for Animal Health and Production, Chiang Mai University, Chiang Mai 50100, Thailand
5. Asian Satellite Campuses Institute, Nagoya University, Nagoya 464-8603, Japan