CYP1A2 and urinary bladder carcinoma: Haplotype 4 (G/A): The fourth haplotype, represented by the G/A genotype of the SNP CYP1A2.3860.G.A, was present in 72 individuals (42.4%) in the bladder cancer patients and 55 individuals (32.4%) in the control group in the codominant model.