VDR and colorectal carcinoma: Our findings of null associations between Cdx2 genotype and survival outcomes among CRC patients are consistent with previously reported null associations of VDR polymorphisms rs731236 (Taq1), rs2228570 (Fok1), Cdx2, and rs1989969 (VDR-5132) with OS and CSS in a significantly smaller (and partly overlapping) sample of CRC patients [14].