Predictors of Naltrexone Response in a Randomized Trial: Reward-Related Brain Activation, OPRM1 Genotype, and Smoking Status. - Schacht JP; Randall PK; Latham PK; Voronin KE; Book SW; Myrick H; Anton RF (Neuropsychopharmacology : official publication of the American College of Neuropsychopharmacology, 2017)