1. Department of Spine Surgery, The First People’s Hospital of Huaihua City, Huaihua, 418000 Hunan, China
2. Department of Orthopaedic Trauma, Yantaishan Hospital, Yantai, 264000 Shandong, China
3. Department of Oncology, Yantaishan Hospital, Yantai, 264000 Shandong, China
4. Cancer Center, The First People’s Hospital of Huaihua City, Huaihua, 418000 Hunan, China
5. Department of Spine Surgery, Yantaishan Hospital, Yantai, 264000 Shandong, China