We found a matchYour institution may have access to this item. Find your institution then sign in to continue.TitleDo delta9-tetrahydrocannabinol concentrations indicate recent use in chronic cannabis users?AuthorsKarschner EL; Schwilke EW; Lowe RH; Darwin WD; Pope HG; Herning R; Cadet JL; Huestis MAPublicationAddiction, 2009, Vol 104, Issue 12, p2041ISSN0965-2140Publication typearticleDOI10.1111/j.1360-0443.2009.02705.x