1. Lanzhou University Second Hospital, No. 82, Cuiyingmen, Chengguan District, Lanzhou, Gansu, China
2. Key Laboratory of Digestive System Tumors of Gansu Province, No. 82, Cuiyingmen, Chengguan District, Lanzhou, Gansu, China
3. Gansu Provincial Hospital, No. 204, Donggang West Road, Chengguan District, Lanzhou, Gansu, China
4. Southern University of Science and Technology Hospital, No. 6019, Xili Liuxian Avenue, Nanshan District, Shenzhen, Guangdong, China