1. Department of Radiation Sciences, Graduate School of Health Sciences, Hirosaki University, Hirosaki, Aomori 036‑8564, Japan
2. Department of Bioscience and Laboratory Medicine, Graduate School of Health Sciences, Hirosaki University, Hirosaki, Aomori 036‑8564, Japan
3. Department of Oral and Maxillofacial Surgery, School of Dentistry, Health Sciences University of Hokkaido, Tobetsu‑cho, Ishikari‑gun, Hokkaido 061‑0293, Japan