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Before settling into her chair for a Virginia Festival of the Book talk about her new book, "Art Work: On the Creative Life," photographer Sally Mann described feeling at home on the Paramount Theater stage.

[43] Disposable e-cigarettes are offered for a few dollars, and higher-priced reusable e-cigarettes involve an up-front investment for a starter kit

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Estimating the effect of smoking cessation on weight gain: an instrumental variable approach