1. Department of Cancer Research Laboratory, Department of Pathology, Affiliated Hospital of Zunyi Medical University, Zunyi, Guizhou 563003, P.R. China
2. Department of Oncology, Guihang Guiyang Hospital, Guiyang, Guizhou 550000, P.R. China
3. Department of Thoracic Surgery, Affiliated Hospital of Zunyi Medical University, Zunyi, Guizhou 563003, P.R. China