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Just a dram

Science News,  May 5, 2007  by Ellen Waggener

"Natural-Born Addicts: Brain differences may herald drug addiction" (SN: 3/3/07, p. 133) describes an elegant study. I found the 7 percent addiction-susceptible figure interestingly similar to the 10 percent of people who drink alcohol who become addicted. I wonder if similar percentages of other species are impulsive and vulnerable.

ELLEN WAGGENER, POUGHKEEPSIE, N.Y.

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