1. Division of Oral Diagnosis Department of Oral Biomedical Sciences Faculty of Dentistry Khon Kaen University Khon Kaen Thailand
2. Laser in Dentistry Research Group Khon Kaen University Khon Kaen Thailand
3. Melatonin Research Group Khon Kaen University Khon Kaen Thailand
4. Faculty of Dentistry Khon Kaen University Khon Kaen Thailand
5. Division of Periodontology Department of Oral Biomedical Sciences Faculty of Dentistry Khon Kaen University Khon Kaen Thailand
6. Department of Electrical Engineering Faculty of Engineering Khon Kaen University Khon Kaen Thailand