Letter to the Editor regarding "Simultaneous determination of ∆9-tetrahydrocannabinol and 11-nor-9-carboxy-∆9-tetrahydrocannabinol in oral fluid using isotope dilution liquid chromatography tandem mass spectrometry”
In: Analytical and Bioanalytical Chemistry, 2013, vol. 405, no. 1, p. 435-437
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