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Blood plasma levels. Blood samples were collected before the second single photon emission computed tomography (SPECT) scan and after the pharmacological magnetic resonance imaging (phMRI) scan. Citalopram plasma levels (μg/L) were determined using mass spectrometry. (a) Citalopram plasma levels prior to SPECT 2 at 3 h post-oral-citalopram. (b) Citalopram plasma levels after the phMRI scan at 30 min post-iv- citalopram on a log scale.
*Analysis of variance: p<0.05
iv: intravenous
