1. Khon Kaen University,Visual Intelligence Laboratory,Department of Statistics,Khon Kaen,Thailand
2. Mahidol University,Faculty of Dentistry,Department of Pediatric Dentistry,Bangkok,Thailand
3. Mahidol University,Faculty of Dentistry,Department of Oral and Maxillofacial Radiology,Bangkok,Thailand
4. Khon Kaen University,Visual Intelligence Laboratory, Faculty of Science,Department of Statistics,Thailand