1. Division of Clinical Cell Therapy; United Centers for Advanced Research and Translational Medicine (ART), Tohoku University Graduate School of Medicine, 2-1 Seiryo-machi; Aoba-ku Sendai 980-8575 Japan
2. Department of Finemechanics; Graduate School of Engineering, Tohoku University, 6-6-01 Aramaki; Aoba-ku Sendai 980-8579 Japan
3. Division of Transplantation and Regenerative Medicine; United Centers for Advanced Research and Translational Medicine (ART), Tohoku University Graduate School of Medicine, 1-1 Seiryo-machi, Aoba-ku; Sendai 980-0872 Japan