The distribution of VDR in 203 subjects was BB genotype 17(8.3%), Bb 60(29.6%), bb(62.1%), respectively. The B allelic gene frequencies reached 23.05%. The distribution followed the Hardy-Weinberg equilibrium.

• 203例受试对象中；VDR基因型分别为BB型17例(占8.；3%25)、Bb型60例(占29