1. Department of Advanced Prosthodontics, Tokyo Medical and Dental University (TMDU), Tokyo, Japan
2. Department of Biomaterials Science, Turku Clinical Biomaterials Centre - TCBC, Institute of Dentistry, University of Turku, Turku, Finland
3. School of Dentistry, Faculty of Dentistry, Tokyo Medical and Dental University (TMDU), Tokyo, Japan
4. Pharmaceuticals and Medical Devices Agency (PMDA), Tokyo, Japan