1. Department of Radiology, Katsuragi Hospital, Kishiwada City, Osaka, Japan;
2. Department of Gerontological Nursing/Wound Care Management, Division of Health Sciences and Nursing, University of Tokyo;
3. University of Tokyo Hospital;
4. Department of Orthopedics, Katsuragi Hospital, Kishwada City, Osaka, Japan;
5. Graduate School of Health Sciences, Kanazawa University, Kanazawa City, Ishikawa, Japan.