Affiliation: | a Department of Oral and Maxillofacial Surgery, Niigata University Dental Hospital, Niigata 951-8514, Japan b Department of Orthodontics, Niigata University Dental Hospital, 2-5274 Gakkocho-dori, Niigata 951-8514, Japan c Department of Medical Inforamatics, Niigata University Medical Hospital, Niigata University, 1-757 Asahimachi-dori, Niigata 951-8510, Japan |