Frequency of at least one rare <i>MUC2</i>–MS6 allele in cancer cases and the risk of cancer.

GC-Group I and II represent two different groups with gastric cancer. They were obtained from two different hospital groups in two different cities (Dong-A University [I] and Chungbuk University [II]). *Statistically significant (p<0.05). **Pearson's Chi-squared test with simulated p-value (based on 10,000 replicates). ***One case had two alleles: C/C, two common alleles; C/R, one rare and one common allele; R/R, two rare alleles [****One gastric cancer case had two rare alleles].