1. Japan Synchrotron Radiation Research Institute, SPring-8, 1-1-1, Kouto, Sayo, Hyogo 679-5198, Japan
2. Department of Mechanical Engineering, Kyushu University, 744, Motooka, Nishi Ward, Fukuoka City, Fukuoka 819-0395, Japan
3. Department of Materials Science and Engineering, Iwate University, 4-3-5 Ueda, Morioka City, Iwate 020-8551, Japan
4. Laboratory of Cell and Tissue Biology, Keio University School of Medicine, 35 Shinanomachi, Shinjuku-ku, Tokyo 160-8582, Japan
5. Division of Mechanical and Aerospace Engineering, Faculty of Engineering, Hokkaido University, Kita 13, Nishi 8, Kita-ku, Sapporo, Hokkaido 060-8628, Japan