[1] Tohoku Univ Dent Hosp, Clin Dent Disable, Sendai, Miyagi 9808575, Japan
[2] Okayama Univ, Grad Sch Med Dent, Dept Dent Pharmacol, Okayama 7008525, Japan
[3] Tohoku Univ, Grad Sch Dent, Div Ped Dent, Sendai, Miyagi 9808575, Japan
[4] Hoshi Univ, Fac Pharmaceut Sci, Dept Pathophysiol & Therap, Tokyo, Japan
[5] Tohoku Univ, Sch Dent, Dept Pharmacol, Sendai, Miyagi 980, Japan