%0 Journal Article %T Drug Testing in Blood: Validated Negative-Ion Chemical Ionization Gas Chromatographic–Mass Spectrometric Assay for Enantioselective Measurement of the Designer Drugs MDEA, MDMA, and MDA and Its Application to Samples from a Controlled Study with MDMA %A Peters, Frank, T %A Samyn,, Nele %A Lamers, Caroline, TJ %A Riedel, Wim, J %A Kraemer,, Thomas %A , de BoeckGert %A Maurer, Hans, H %J Clinical Chemistry %V 51 %N 10 %@ 0009-9147 %D 2005-10-01 %I Oxford Academic %~ DeepDyve