Camprodon-Rosanas E, Pujol J, Martínez-Vilavella G, Blanco-Hinojo L, Medrano-Martorell S, Batlle S, Forns J, Ribas-Fito N, Dolz M, Sunyer J. Brain structure and function in school-aged children with sluggish cognitive tempo symptoms. J Am Acad Child Adolesc Psychiatry. 2019 Feb;58(2):256-96. doi: 10.1016/j.jaac.2018.09.441
Walker EA, Picker MJ, Granger AL, Dykstra LA. Effects of opioids in morphine-treated pigeons trained to discriminate among morphine, the low-efficacy agonist nalbuphine, and saline. J Pharmacol Exp Ther. 2004 Jul;310(1):150-8.
Allen RM, Granger AL, Dykstra LA. The competitive N-methyl-D-aspartate receptor antagonist (-)-6-phosphonomethyl-deca-hydroisoquinoline-3-carboxylic acid (LY235959) potentiates the antinociceptive effects of opioids that vary in efficacy at the mu-opioid receptor. J Pharmacol Exp Ther. 2003 Nov 1;307(2):785-92.
Allen RM, Granger AL, Dykstra LA. Dextromethorphan potentiates the antinociceptive effects of morphine and the delta-opioid agonist SNC80 in squirrel monkeys. J Pharmacol Exp Ther. 2002 Feb 1;300(2):435-41.