1. Department of Oral and Maxillofacial Radiology, Faculty of Dentistry, Chulalongkorn University, Bangkok, Thailand.
2. Department of Hospital Dentistry, Faculty of Dentistry, Khon Kaen University, Khon Kaen, Thailand.
3. Department of Oral Pathology, Faculty of Dentistry, Chulalongkorn University, Bangkok, Thailand.
4. Department of Oral and Maxillofacial Surgery, Faculty of Dentistry, Chulalongkorn University, Bangkok, Thailand.