1. The First Affiliated Hospital of Shaoyang University, Shaoyang, Hunan 422000, China
2. Shaoyang University, Shaoyang, Hunan 422000, China
3. Key Laboratory of Tumor Cellular & Molecular Pathology (University of South China), College of Hunan Province, Cancer Research Institute, Hengyang Medical College, University of South China, Hengyang, Hunan 421001, China
4. Department of Pathology, Changsha Fourth People’s Hospital, Changsha, Hunan 410006, China