Catechol-O-Methyltransferase Valine158Methionine Polymorphism Moderates Methylphenidate Effects on Oppositional Symptoms in Boys with Attention-Deficit/Hyperactivity Disorder - Salatino-Oliveira, Angélica; Genro, Julia P.; Zeni, Cristian; Polanczyk, Guilherme V.; Chazan, Rodrigo; Guimarães, Ana P.; Callegari-Jacques, Sidia M.; Rohde, Luis A.; Hutz, Mara H. (Biological Psychiatry, 2011)