1. Estimates of the worldwide frequency of twelve major cancers;Parkin;Bull WHO,1984
2. Ras oncogenes in human cancer: a review;Bos;Cancer Res,1989
3. Glycine to aspartic acid mutations at codon 13 of the c-Ki-ras gene in human gastrointestinal cancers;Nagata;Cancer Res,1990
4. Rapid detection of ras oncogenes in human tumors: applications to colon, esophageal and gastric cancer;Jiang;Oncogene,1989
5. A human gastric carcinoma contains a single mutated and an amplified normal allele of the Ki-ras oncogene;Bos;Nucleic Acids Res,1986