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Ann started smoking at the age of 13 but the amount of cigarettes she smokes each day has grown over the years

PMID 31805035

Cancer Res 65:664670 Belinsky SA (2005) Silencing of genes by promoter hypermethylation: key event in rodent and human lung cancer

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The contents of GSH and ROS, the activity of GST, GS and GCL in lung homogenate or cell lysate were detected using commercial assay kit (Sangon Biotech Co., Ltd., Shanghai, China) according to the manufacturer's instructions