The most commonly used chemopreventive agents in the prevention of oral leukoplakia, head and neck cancer, and lung cancer are beta-carotene, vitamin A, and other retinoids. One of the few chemopreventive agents not in this group and presently being used in a clinical trial is N-acetyl-l-cysteine (NAC). NAC, an antioxidant, is used in EUROSCAN, a European… (More)


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