1. Department of Endodontics, Asahi University School of Dentistry, Gifu, Japan
2. Department of Oral Biochemistry, Asahi University School of Dentistry, Gifu, Japan
3. Department of Natural and Medicinal Chemistry, Faculty of Pharmaceutical Sciences, Aomori University, Aomori, Japan
4. Department of Oral and Maxillofacial Surgery, Asahi University School of Dentistry, Gifu, Japan