1. Department of Oral and Maxillofacial Surgery and Biopathology, Okayama University Graduate School of Medicine, Dentistry and Pharmaceutical Science, Okayama 700‑8525, Japan
2. Division of Reconstructive Surgery for Oral and Maxillofacial Region, Department of Human Biology and Pathophysiology, School of Dentistry, Health Sciences University of Hokkaido, Hokkaido 061‑0293, Japan