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Influence of 5-HTTLPR genotype on serotonin transporter (SERT)-immunoreactive (ir) axon length. Analysis of the effects of serotonin transporter genotypes (L/L, L/S, and S/S) on SERT-ir axon length density in layer VI of the orbitofrontal cortex of control subjects and subjects with major depressive disorder (MDD). Mean and S.E.M. values are presented.
