1. Department of Orthopaedic Surgery, Nagoya University Hospital, 65 Tsurumai, Showa-ku, Nagoya, Aichi, Japan
2. Japan Clinical Oncology Group Data Center/Operations Office, National Cancer Center Hospital, Tokyo, Japan
3. Department of Endoprosthetic Surgery, Oita University, Yufu, Japan
4. Department of Orthopaedic Surgery, National Hospital Organization Hokkaido Cancer Center, Sapporo, Japan
5. Department of Orthopaedic Surgery, National Cancer Center, Tokyo, Japan
6. Department of Rehabilitation, Nagoya University Hospital, Nagoya, Japan
7. Department of Orthopaedic Surgery, Tohoku University Hospital, Sendai, Japan
8. Kyushu Rosai Hospital, Kitakyushu, Japan
9. Department of Orthopaedic Surgery, Okayama University Graduate School of Medicine, Dentistry, and Pharmaceutical Sciences, Okayama, Japan