1. Deng DJ. progress of gastric cancer etiology: N-nitrosamides 1999s. World J Gastroenterol 2000;6:613-618.
2. Zhang YL, Zhang ZS, Wu BP, Zhou DY. Early diagnosis for colorectal cancer in China. World J Gastroenterol 2002;8:21-25.
3. Yu J P, Dong WG. Current situation about early diagnosis of can-cer of large intestine. Shijie Huaren Xiaohua Zazhi 1999;7:553-554.
4. Fiocca R, Luinetti O, Villani L, Mastracci L, Quilici P, Grillo F, Ranzani GN. Molecular mechanisms involved in the pathogenesis of gastric carcinoma: interactions between genetic alterations, cellular phenotype and cancer histotype. Hepatogastroenterology 2001;48:1523-1530.
5. Yustein AS, Harper JC, Petroni GR, Cummings OW, Moskaluk CA, Powell SM. Allelotype of gastric adenocarcinoma. Cancer Res 1999;59:1437-1441.