Inactivation of the DNA repair gene O6-methylguanine-DNA methyltransferase by promoter hypermethylation and its relationship to aflatoxin B1-DNA adducts and p53 mutation in hepatocellular carcinoma
Departments of Environmental Health Sciences and Epidemiology, Mailman School of Public Health, Columbia University, 700 West 168th Street, New York, NY 10032, USA.