1. Department of Oral and Maxillofacial Surgery/Orthodontics, Yokohama City University Hospital, Kanagawa, Japan
2. Department of Oral and Maxillofacial Surgery/Orthodontics, Yokohama City University Medical Center, Kanagawa, Japan
3. Department of Oral and Maxillofacial Surgery, Saitama Medical University, Saitama, Japan