1. Department of Anesthesiology, The Fourth Hospital of Hebei Medical University , Shijiazhuang , Hebei , China
2. Laboratory of Pathology, Hebei Cancer Institute, The Fourth Hospital of Hebei Medical University , Shijiazhuang , Hebei , China
3. Department of Thoracic Surgery, The Fourth Hospital of Hebei Medical University , Shijiazhuang , Hebei , China