Departments of Periodontology and Endodontology, Tohoku University Graduate School of Dentistry
4-1 Seiryo-machi, Aoba-ku, Sendai, Miyagi 980-8575, Japan
E-mail: shigeki[D]suzuki[D]b1[A]tohoku[D]ac[D]jp( Please chainge [A] to @ [D] to . )