1. Department of Oral Surgery and Dentistry Fujisawa City Hospital Fujisawa Japan
2. Department of Oral and Maxillofacial Surgery Yokohama City University Graduate School of Medicine Yokohama Japan
3. Department of Dentistry and Oral and Maxillofacial Surgery Shonan Kamakura General Hospital Kamakura Japan
4. Department of Oral and Maxillofacial Surgery–Orthodontics Yokohama City University Medical Center Yokohama Japan