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Oxford University Press

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Temporal Indication of Marijuana Use Can Be Estimated From Plasma and Urine Concentrations of Δ9-Tetrahydrocannabinol, 11-Hydroxy-Δ9-Tetrahydrocannabinol, and 11-Nor-Δ9-Tetrahydrocannabinol-9-Carboxylic Acid

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