Chung CJ, Huang CY, Pu YS, Shiue HS, Su CT, Hsueh YM. The effect of cigarette smoke and arsenic exposure on urothelial carcinoma risk is modified by glutathione S-transferase M1 gene null genotype. Toxicol Appl Pharmacol. 2013 Jan 15;266(2):254–9. doi: 10.1016/j.taap.2012.11.005. PMID: 23159782.