1. Department of Oncology, Xiangya Hospital, Central South University, Changsha, China.
2. Department of Pathology, Tangshan Cancer Hospital, Tangshan, China.
3. Department of Oncology, Chenzhou First People’s Hospital, Chenzhou, China.
4. National Clinical Research Center for Geriatric Disorders, Xiangya Hospital, Central South University, Changsha, China.