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Marijuana Use Associations with Pulmonary Symptoms and Function in Tobacco Smokers Enrolled in the Subpopulations and Intermediate Outcome Measures in COPD Study (SPIROMICS).

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Authors: Madeline A. Morris, Sean R. Jacobson, Gregory L. Kinney, Donald P. Tashkin, et al
Chronic Obstructive Pulmonary Diseases: Journal of the COPD Foundation, 24 January 2018
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Background: Marijuana is often smoked via a filterless cigarette and contains similar chemical makeup as smoked tobacco. There are few publications describing usage patterns and respiratory risks in older adults or in those with chronic obstructive pulmonary disease (COPD). Me…

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If cannabis caused schizophrenia–how many cannabis users may need to be prevented in order to prevent one case of schizophrenia? England and Wales calculations.

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Authors: Matt Hickman, Peter Vickerman, John Macleod, Glyn Lewis, Stan Zammit, et al
Addiction, November 2009
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BACKGROUND: We consider how many cannabis users may need to be prevented in order to prevent one case of schizophrenia or psychosis [defined as number needed to prevent (NNP)]. METHOD: Calculation for England and Wales using best available estimates of: incidence of schizophre…

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Marijuana use and the risk of lung and upper aerodigestive tract cancers: results of a population-based case-control study.

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Authors: Mia Hashibe, Hal Morgenstern, Yan Cui, Donald P. Tashkin, Zuo-Feng Zhang, et al
Cancer Epidemiology Biomarkers & Prevention, October 2008
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BACKGROUND: Despite several lines of evidence suggesting the biological plausibility of marijuana being carcinogenic, epidemiologic findings are inconsistent. We conducted a population-based case-control study of the association between marijuana use and the risk of lung and u…

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