1. Department of Orthopedics Chongqing University Three Gorges Hospital Chongqing China
2. Chongqing Municipality Clinical Research Center for Geriatric Diseases Chongqing University Three Gorges Hospital Chongqing China
3. School of Graduate North Sichuan Medical College Nanchong China
4. Department of Orthopedics The Third Affiliated Hospital of Southern Medical University Guangzhou China
5. Department of Spinal Surgery Guangdong Second Provincial General Hospital Guangzhou China
6. Central Laboratory Chongqing University Three Gorges Hospital Chongqing China