ABCC1 and cancer: Multivariate analysis confirmed that the independent variables associated with VIPN to any degree in pediatric cancer patients were age at diagnosis (OR = 1.33; 95% CI = 1.07–1.75; p = 0.016) and the ABCC1 rs246240—G allele (OR = 12.45; 95% CI = 2.26–100.42; p = 0.006; G vs. AA) (Table 4).