1. Department of Removable Prosthodontics Nihon University School of Dentistry at Matsudo Chiba Japan
2. Research Institute of Oral Science Nihon University School of Dentistry at Matsudo Chiba Japan
3. Human Technology Research Institute National Institute of Advanced Industrial Science and Technology (AIST) Ibaraki Japan
4. Department of Oral Health Science Division of Oral Function and Rehabilitation Nihon University School of Dentistry at Matsudo Chiba Japan
5. Dental Support Co. Ltd. Chiba Japan
6. Department of Anesthesiology Nihon University School of Dentistry at Matsudo Chiba Japan