ABCB1 and colorectal carcinoma: Regarding the ABCB1 gene, Puerta-García et al. (European ancestry; Spain) found no significant associations in univariate analysis performed with Bonferroni correction (p > 0.01) for the CC genotype of the ABCB1 rs1128503 SNP (c.1236T>C; synonymous; p.Gly412Gly) with severe overall toxicity, or any other toxicity subtype, in 84 patients with CRC (stages I–IV) receiving first-line treatment with adjuvant capecitabine [31].