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not only links cigarette use to alcohol and illicit drug use, but the points the way for society to hareness the fear of addiction to help both prevent and treat nicotin addiction.based on an understanding the brain biology of reward,gold and his collagues provide policy makers ,clinicians,and the public with the best ever look at the reason why 90%of the nations more than 60 million cigaratte smokers want to quit but have trouble achieving that life saving goal.