RT @Stanford: Why is smoking increasingly a behavior associated with poverty? Prof @KeithNHumphreys on the @Wonkblog: http://stanford.io/1IKKbAW
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And amongst those with mental illness: 31% of all cigarettes in US http://www.cdc.gov/features/vitalsigns/smokingandmentalillness/ …
@Stanford@KeithNHumphreys@Wonkblog@StanfordMedThanks. Twitter will use this to make your timeline better. UndoUndo
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