1. Department of Biotechnology, Graduate School of EngineeringNagoya UniversityFuro‐choChikusa‐kuNagoya, Aichi464‐8603Japan
2. Department of EngineeringNagoya Institute of TechnologyGokiso‐choShowa‐kuNagoya, Aichi466‐8555Japan
3. Tissue Engineering Research Group, Division of Molecular Therapy, The Institute of Medical ScienceThe University of TokyoMinato‐kuTokyo108‐8639Japan
4. Department of Oral and Maxillofacial SurgeryMatsumoto Dental University School of DentistryHirookaShiojiri399‐0781Japan
5. Nikon CorporationChiyoda‐kuTokyo100‐8331Japan
6. Department of Basic Medicinal Sciences, Graduate School of Pharmaceutical SciencesNagoya UniversityFuro‐choChikusa‐kuNagoya, Aichi464‐8601Japan