RT NORMLCanada "Should Per Se Limits Be Imposed For Cannabis? Equating Cannabinoid Blood Concentrations with Actual Driver Impairment: Practical Limitations and Concerns https://t.co/psRWE8ckRA"
RT NORMLCanada "Should Per Se Limits Be Imposed For Cannabis?
— Ken Kirk (DocReefer) (@Kenlenkirk) March 25, 2018
Equating Cannabinoid Blood Concentrations with Actual Driver Impairment: Practical Limitations and Concerns https://t.co/psRWE8ckRA"
from Twitter https://twitter.com/Kenlenkirk
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