1. Department of Oral and Maxillofacial Surgery, Graduate School of Medicine, Kyoto University, Kyoto 606‑8507, Japan
2. Department of Plastic and Reconstructive Surgery, Graduate School of Medicine, Kyoto University, Kyoto 606‑8507, Japan
3. Department of Oral and Maxillofacial Surgery, Ama Municipal Hospital, Ama, Aichi 490‑1111, Japan