1. Division of Pharmaceutical Technology, Faculty of Pharmaceutical Sciences, Khon Kaen University, Khon Kaen 40002, Thailand
2. Melatonin Research Group, Khon Kaen University, Khon Kaen 40002, Thailand
3. Division of Clinical Pharmacy, Faculty of Pharmaceutical Sciences, Khon Kaen University, Khon Kaen 40002, Thailand
4. Department of Otorhinolaryngology, Faculty of Medicines, Khon Kaen University, Khon Kaen 40002, Thailand