1. Jianping Wang. Current and future situation of colorectal carcinoma screening .Journal of Digestive Surgery 2006; 5: 303–305
2. Fang SG, Yang JZ, Yang F. Clinical characteristics of 610 cases with multiple primary malignant neoplasm’s in digestive tract. Shijie Huaren Xiaohua Zazhi 1999; 7: 812
3. Wang MR, Guo CH, Li MS, et al. A case-control study on the dietary risk factors of upper digestive tract cancer. Zhonghua Liuxingbingxue Zazhi 1999; 20: 95–97
4. Yu BM, Zhao R. Molecular biology of colorectal carcinoma. Shijie Huaren Xiaohua Zazhi 1999; 7: 173–175
5. Chen SY, Wu TF, Liu HY, et al. Hospital-based ten-year data of gastroendoscopy. Shijie Huaren Xiaohua Zazhi 1999; 7: 15–17