%0 Journal Article %T Liquid Chromatography-Tandem Mass Spectrometry Analysis of Urine Specimens for K2 (JWH-018) Metabolites %A ElSohly, Mahmoud A. %A Gul, Waseem %A ElSohly, Kareem M. %A Murphy, Timothy P. %A Madgula, Vamsi L.M. %A Khan, Shabana I. %J Journal of Analytical Toxicology %V 35 %N 7 %P 487-495 %@ 0146-4760 %D 2011-09-01 %I Oxford University Press %~ DeepDyve