1. Department of General Surgery, Xiangtan Central Hospital, Xiangtan 410000, Hunan, P.R. China
2. Department of Pathology, Xiangtan Central Hospital, Xiangtan 410000, Hunan, P.R. China
3. Department of Pharmacy, The Third Hospital of Changsha, Changsha 410000, Hunan, P.R. China
4. Department of Oncology, The First Affiliated Hospital of Chengdu Medical College, Chengdu 610500, Sichuan, P.R. China
5. Clinical Medical College, Chengdu Medical College, Chengdu 610500, Sichuan, P.R. China