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Simultaneous quantitation of meperidine,normeperidine, tramadol,propoxyphene and norpropoxyphene in human plasma using solid‐phase extraction and gas chromatography/mass spectrometry: Method validation and application to cardiovascular safety of therapeutic doses |
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| Authors: | Nicolás Fernández Nancy Mónica Olivera Guillermo Alberto Keller Roberto Alberto Diez Guillermo Di Girolamo Patricia Noemí Quiroga |
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