Conference ProceedingsQuantitative Liquid Chromatography/Tandem Mass Spectrometry (LC/MS/MS) Analysis of 39 Fentanyl Analogs and Metabolites in Blood, Urine, and Oral FluidPresenting section:Toxicology2019Huestis, Marilyn A., Severna Park MD; Andrada, Dominic, Sunnyvale CA; Doyle, Rory M., Somerset NJView the paperToxicology