VDR and renal cell carcinoma: When haplotypes were stratified by occupational UV category, only males in the highest UV exposure category with the same VDR haplotype, A-G-C, were shown to have a significantly stronger increase in RCC risk (OR = 1.70; 95%CI = 1.14–2.53) compared to males with the referent haplotype, G-A-T.