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The effects of catechol-O-methyltransferase (COMT) Val158Met genotype on percent prepulse inhibition (PPI) of the acoustic startle response at prepulse (onset)-to-pulse (onset) intervals of 30, 60, and 120 msec in 45 healthy human male volunteers (means and SEM, adjusted for smoking; Tukey honest significant difference post hoc test versus the MetMet-group. (*)p = .08, *p < .05).
