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Case-controlled studies and cohort studies have not shown an increased risk [54, 55], while other epidemiological studies have reported associations with lung cancer with heavier marijuana use

CONFLICTS OF INTEREST The authors have completed and submitted an ICMJE form for disclosure of potential conflicts of interest and they declare that they have no competing interests, financial or otherwise, related to the current work

J Med Internet Res 22:

Tobacco-specific nitrosamines in the tobacco and mainstream smoke of U.S

Ravandi F, Faderl S, Thomas D, Burger JA , Koller C, Garcia-Manero G, Morris G, Torma R, Kantarjian H, Issa J