1. Hunan Province Key Laboratory of Tumor Cellular & Molecular Pathology, Cancer Research Institute, Hengyang Medical School, University of South China, Hengyang, Hunan 421001, China
2. School of Nursing, Hengyang Medical School, University of South China, Hengyang, Hunan 421001, China
3. Department of Spine Surgery, The First Affiliated Hospital, University of South China, Hengyang, Hunan 421001, China