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In support of well-established mucus overproduction in response to smoking 8 , we observed clear trends toward increased frequencies of both surface and SMG mucus secretory cells, as well as a decreased frequency of ciliated cells among smokers

FREE Full Text 10 Alpert, HR, Connolly GN, Biener, L, A prospective cohort study challenging the effectiveness of population-based medical intervention for smoking cessation, TC Online First, January 10, 2012

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Alton Ochsnera physician who had been warning his colleagues for at least seventeen years of a suspicious relationship between smoking and lung cancerin which he flatly called smoking a principal cause of the disease