Heroin and amphetamine users display opposite relationships between trait and neurobehavioral dimensions of impulsivity.
Vassileva J, Paxton J, Moeller FG, Wilson MJ, Bozgunov K, Martin EM, Gonzalez R, Vasilev G. Heroin and amphetamine users display opposite relationships between trait and neurobehavioral dimensions of impulsivity. Addict Behav. 2014 Mar; 39(3):652-9.