1. Division of Oral Physiology, Tohoku University Graduate School of Dentistry, Sendai 980-8575, Japan
2. Laboratory of Health Chemistry, Graduate School of Pharmaceutical Sciences, Tohoku University, Sendai 980-8578, Japan
3. Cell Resource Center for Biomedical Research, Institute of Development, Aging and Cancer, Tohoku University, Sendai 980-8575, Japan
4. Graduate School of Life Sciences, Tohoku University, Sendai 980-8577, Japan
5. Division for Globalization Initiative, Tohoku University Graduate School of Dentistry, Sendai 980-8575, Japan
6. Division of Pharmacology, Meikai University School of Dentistry, Sakado 350-0283, Japan