1. Nara Medical University Department of Orthopaedic Surgery, , Nara , Japan
2. Nara Medical University Department of Rehabilitation Medicine, , Nara , Japan
3. National Institute of Public Health Department of Health and Welfare Services, , Saitama , Japan
4. National and Kapodistrian University of Athens, School of Medicine First Department of Orthopaedics, , Athens , Greece
5. IRCCS Istituto Ortopedico Rizzoli Department of Orthopaedic Oncology, , Bologna , Italy
6. National Cancer Center Hospital Division of Musculoskeletal Oncology, , Tokyo , Japan