Figure 1From: Association study between vitamin D receptor gene polymorphisms and asthma in the chinese han population: a case-control study Frequency distribution of VDR-rs7975232 within the two groups (case/control) in the Chinese population studied. The bars represent the frequencies of the 3 genotypes, CC, CA, AA, which are labeled by 1, 2, 3, respectively, in each group. We can clearly see that AA genotype is underrepresented in the group of asthmatic patients.Back to article page