MR1 and urinary bladder cancer: Variants in MR1 were not associated with bladder cancer incidence in the matched control group analysis (unadjusted p-value = 0.422), and the age at diagnosis was not significantly different (mean 69.1 years for those with variants, mean 71.0 years for those with no variants), even though significantly worse OS for MR1 variant-carriers was observed.