1. Department of Periodontology, Osaka University Graduate School of Dentistry, Suita, Osaka 565-0871, Japan.
2. Biomedical Research Institute, National Institute of Advanced Industrial Science and Technology (AIST), Tsukuba, Ibaraki 305-8566, Japan.
3. Department of Oral Anatomy and Development, Osaka University Graduate School of Dentistry, Suita, Osaka 565-0871, Japan.
4. Center for Frontier Oral Science, Graduate School of Dentistry, and Graduate School of Frontier BioSciences, Osaka University, Osaka 565-0871, Japan.
5. Lion Corporation, Tokyo 132-0035, Japan.
6. Department of Biomaterials, Max Planck Institute of Colloids and Interfaces, Potsdam-Golm 14476, Germany.