1. Department of Oncology, Third Xiangya Hospital of Central South University, Changsha 410013, China
2. Department of Gastroenterology, Third Xiangya Hospital of Central South University, Changsha 410013, China
3. Department of Urology, Third Xiangya Hospital of Central South University, Changsha 410013, China
4. Department of Dermatology, Third Xiangya Hospital of Central South University, Changsha 410013, China