1. Department of Oral and Maxillofacial Surgery, Dokkyo Medical University School of Medicine, Mibu, Tochigi 321‑0293, Japan
2. Department of Oral Pathology, School of Dentistry, Aichi‑Gakuin University, Nagoya, Aichi 464‑8650, Japan
3. Division of Research and Treatment for Oral and Maxillofacial Congenital Anomalies, School of Dentistry, Aichi‑Gakuin University, Nagoya, Aichi 464‑8650, Japan