1. Dept. of Biotechnology, Graduate School of Engineering; Osaka University, 2-1 Yamadaoka; Suita Osaka 565-0871 Japan
2. Stem Cell and Tissue Engineering Cluster; Indonesian Medical Education and Research Institute (IMERI), Faculty of Medicine, Universitas Indonesia; Central Jakarta 10430 Indonesia
3. Dept. of Applied Chemistry and Bioengineering, Graduate School of Engineering; Osaka City University, 3-3-138 Sugimoto; Sumiyoshi-ku Osaka 558-8585 Japan