1. Tissue Engineering Research Group, Health Research Institute, National Institute of Advanced Industrial Science and Technology (AIST), Amagasaki, Hyogo 661-0974, Japan.
2. Present address: Department of Otolaryngology, Graduate School of Medicine, Kyoto University, Kyoto 606-8507, Japan.
3. Functional Biomolecular Research Group, Health Research Institute, National Institute of Advanced Industrial Science and Technology (AIST), Amagasaki, Hyogo 661-0974, Japan.
4. Stress Signal Research Group, Health Research Institute, National Institute of Advanced Industrial Science and Technology (AIST), Ikeda, Osaka 563-8577, Japan.