I said it before about these studies, they are confounded. You can't use tobacco smokers that smoke weed as a study group. I am not saying smoking anything is healthy for you, just that a study has to be done on those who only smoke marijuana for valid, empirical results. Blaze on people.... ;\)
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Don't believe everything that you think.

"Holy hell son, you're about as useful as a cock flavored lollipop."