%0 Letter %T A comparison of cannabidiol (CBD) concentrations in venous vs. fingertip-capillary blood. %A Johnson DA %A James LJ %A Heaney LM %J Clin Chem Lab Med %V 62 %N 4 %D 2024 Mar 25 %M 37852610 %F 8.49 %R 10.1515/cclm-2023-0928