VDR and cancer: In line with our results, we found a meta-analysis conducted in 1588 patients of various ethnicities (from the United States, Taiwan, and China) diagnosed with cancer, in which the VDR rs7975232 (ApaI)-AA genotype was associated with lower overall survival (p = 0.0001, HR = 1.77, 95% CI = 0.79–2.75, I2 = 0.95; AA vs. CC), as well as with an increased risk of progression of the disease in patients (p < 0.05, HR = 1.29, 95% CI = 1.02–1.56, I2 = 0; AA vs. CC) [14].