6 Ichimura Ichimura Y Y Habuchi Habuchi T T Tsuchiya Tsuchiya N N Wang Wang L L Oyama Oyama C C Sato Sato K K Increased risk of bladder cancer associated with a glutathione peroxidase 1 codon 198 variant Increased risk of bladder cancer associated with a glutathione peroxidase 1 codon 198 variant The Journal of urology. This evidence concerns the gene GPX1 and urinary bladder cancer.