1. Department of Anesthesiology, The Fourth Hospital of Hebei Medical University, Shijiazhuang, Hebei 050000, P.R. China
2. Tumor Research Institute, The Fourth Hospital of Hebei Medical University, Shijiazhuang, Hebei 050000, P.R. China
3. Department of Radiology, The Fourth Hospital of Hebei Medical University, Shijiazhuang, Hebei 050000, P.R. China