1. Department of Gastrointestinal Surgery, The Third Xiangya Hospital of Central South University, Changsha, Hunan 410013, P.R. China
2. Department of Tumor Surgery, Shaoyang Hospital of TCM, Shaoyang, Hunan 422000, P.R. China
3. Department of Nuclear Medicine, The Third Xiangya Hospital of Central South University, Changsha, Hunan 410013, P.R. China
4. Department of Emergency Medicine and Intensive Care Unit, The Third Xiangya Hospital of Central South University, Changsha, Hunan 410013, P.R. China