<a href="https://pubs.rsna.org/doi/10.1148/radiol.212611" rel="nofollow">https://pubs.rsna.org/doi/10.1148/radiol.212611</a><p>> Airway inflammation and emphysema were more common in marijuana smokers than in nonsmokers and tobacco-only smokers, although variable interobserver agreement and concomitant cigarette smoking among the marijuana-smoking cohort limits our ability to draw strong conclusions.<p>so the marijuana smokers may have also been tobacco smokers limiting the ability to draw strong conclusions? am i reading that right?<p>seems like wsj may be jumping the gun and misrepresenting things, but the article is behind a paywall so who knows.
Seems misleading.<p>"Marijuana users excluded and added to Marijuana smokers group".<p>Would have been fruitful if there were 4 groups, Marijuana only, Mixed, Tobacco only, and Non-Smokers.<p>The introduction seems kinda biased from the start:<p>"Marijuana is the most widely used illicit psychoactive substance in the world (1) and the second-most commonly smoked substance after tobacco..."<p>"...Its use has increased in Canada since the legalization of Medical...".<p>does not compute.