1. Veterinary Technology Program, Faculty of Technology; Udon Thani Rajabhat University; Udon Thani 41000 Thailand
2. Department of Pharmacology, Faculty of Medicine; Khon Kaen University; Khon Kaen 40002 Thailand
3. Department of Physiology, Faculty of Medicine; Khon Kaen University; Khon Kaen 40002 Thailand