1. Department of Oral & Maxillofacial Surgery, Faculty of Dentistry, Mahidol University, Bangkok, Thailand.
2. Department of Oral and Maxillofacial surgery, OM Samaj Dental Hospital, Naikap, Kathmandu, Nepal.
3. Oral and Maxillofacial Radiology Department, Faculty of Dentistry, Mahidol University, Bangkok, Thailand.
4. Oral and Maxillofacial Surgery Department, Faculty of Dentistry, Bangkokthonburi University, Bangkok, Thailand.