DAPK1 and urothelial carcinoma: In urothelial carcinomas, promoter methylation of tumor suppressors protease serine 3 (Homo sapiens; PRSS3) and Ras association (RalGDS/AF-6) domain family member 1 (RASSF1A) (Marsit et al., 2006a) and death-associated protein kinase 1 (DAPK) (Chen et al., 2007) was correlated with arsenic exposure between individuals exposed and not exposed from New Hampshire and Taiwan.