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A comment on Cannabis Access and Academic Performance. Parent comment

Re:Cannabis Access and Academic Performance by dubhrosa on Sunday October 11, 2015 @10:55AM (#10369472)
The results all talk about tests that measure levels in the urine or blood, not the level in the brain, sorry if I'm being thick, but I don't see any actually measure brain levels.
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Re:Cannabis Access and Academic Performance by DanBC on Sunday October 11, 2015 @10:58AM (#10369484)
Parent poster is responding to your question:

> What kind of things can they measure from urine and saliva?

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