A good alarmist headline, sure to get on all the major news reports. You have to read into it a bit before you find out that the vast majority of these persons also smoked tobacco. Come on you scientists, you do know the difference between correlation and causation? Don't you?
http://www.cbsnews.com/8301-204_162-57567943/marijuana-smoking-may-increase-stroke-risk-for-young-adults/
The offending paragraph;
However, all but one of the stroke patients who had marijuana in their
urine also used tobacco. Barber still believes the marijuana was the
culprit.
A commentators' comments;
However, the article shows that the "evidence" is anecdotal & does
not prove a cause-and-effect relationship btwn pot and these dire
maladies. Therefore the researcher's conclusions that such a
realtionship exists is simply an opinion & not a scientific result.
And more great headlines;
Marijuana Use Doubles Risk Of Stroke
Smoking Marijuana Associated With Higher Stroke Risk in Young Adults
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