[1] Japan Sci & Technol Corp, JST, Chiyoda Ku, Tokyo 1028666, Japan
[2] Hiroshima Univ, Fac Dent, Dept Biochem, Hiroshima 7348553, Japan
[3] Hiroshima Univ, Fac Dent, Dept Prevent Dent, Hiroshima 7348553, Japan
[4] Gunma Univ, Sch Med, Dept Orthopaed Surg, Maebashi, Gumma 3718511, Japan