Fig. 5From: Association of vitamin D receptor gene rs739837 polymorphism with type 2 diabetes and gestational diabetes mellitus susceptibility: a systematic review and meta-analysisFunnel plot of the odds ratios in the overall meta-analysis. A Allele model: T vs. G. B Homozygote model: TT vs. GG. C Heterozygote model: GT vs. GG. D Recessive model, TT vs. GG + GT. E Dominant model: TT + GT vs. GGBack to article page