日本东北大学大学院;
Department of Materials Science, Graduate School of Engineering, Tohoku University,Aoba-yama 6-6-02, Sendai 980-8579, Japan;
Tohoku University Biomedical Engineering Research Organization, 2-1 Seiryo-machi,Aoba-ku, Sendai 980-8575, Japan;
Department of Materials Science;