1. Department of Orthopaedic Surgery, Tohoku University Graduate School of Medicine, Sendai, Japan
2. Department of Nursing, Tohoku Fukushi University, Sendai, Japan
3. Department of Physiology, Nihon University School of Dentistry, Tokyo, Japan
4. Department of Orthopaedic Surgery, Matsuda Hospital, Sendai, Japan
5. Graduate School of Biomedical Engineering, Tohoku University, Sendai, Japan
6. Department of Orthopaedic Surgery, JR Sendai Hospital, Sendai, Japan
7. Department of Orthopaedic Surgery, Iwate Prefectural Central Hospital, Morioka, Japan
8. Division of Advanced Prosthetic Dentistry, Tohoku University Graduate School of Dentistry, Sendai, Japan