1. Musculoskeletal Tumor Center, Peking University People's Hospital, Beijing, 100044, China
2. Beijing Key Laboratory of Musculoskeletal Tumor, Beijing, 100044, China
3. Department of Orthopedics, Qilu Hospital of Shandong University, Jinan, 250012, China
4. Department of Pathology, Peking University People's Hospital, Beijing, 100044, China