1. Department of Endodontics, Asahi University School of Dentistry, Mizuho, Gifu 501‑0296, Japan
2. Department of Oral Biochemistry, Asahi University School of Dentistry, Mizuho, Gifu 501‑0296, Japan
3. Department of Oral Pathology, Asahi University School of Dentistry, Mizuho, Gifu 501‑0296, Japan