GAD1 and opiate dependence: The focus of this study was to determine the role of GABA(A)Rs in VTA GABA neuron hyperexcitability produced by acute and chronic ethanol exposure in GAD-67 GFP mice, similar to what we have described with opiate dependence (Ting-A-Kee et al., 2013; Vargas-Perez et al., 2014).