Center on Drug and Alcohol Research, Department of Behavioral Science, University of Kentucky, Lexington, Kentucky (S.C.B.); School of Molecular Biosciences, Paul G. Allen School for Global Animal Health (A.G.G.), Integrative Physiology and Neuroscience (A.M.P.), and Department of Psychology (R.M.C.), Washington State University, Pullman, Washington; and RTI International, Research Triangle Park, North Carolina (J.L.W.)

Center on Drug and Alcohol Research, Department of Behavioral Science, University of Kentucky, Lexington, Kentucky (S.C.B.); School of Molecular Biosciences, Paul G. Allen School for Global Animal Health (A.G.G.), Integrative Physiology and Neuroscience (A.M.P.), and Department of Psychology (R.M.C.), Washington State University, Pullman, Washington; and RTI International, Research Triangle Park, North Carolina (J.L.W.)

Center on Drug and Alcohol Research, Department of Behavioral Science, University of Kentucky, Lexington, Kentucky (S.C.B.); School of Molecular Biosciences, Paul G. Allen School for Global Animal Health (A.G.G.), Integrative Physiology and Neuroscience (A.M.P.), and Department of Psychology (R.M.C.), Washington State University, Pullman, Washington; and RTI International, Research Triangle Park, North Carolina (J.L.W.)

Center on Drug and Alcohol Research, Department of Behavioral Science, University of Kentucky, Lexington, Kentucky (S.C.B.); School of Molecular Biosciences, Paul G. Allen School for Global Animal Health (A.G.G.), Integrative Physiology and Neuroscience (A.M.P.), and Department of Psychology (R.M.C.), Washington State University, Pullman, Washington; and RTI International, Research Triangle Park, North Carolina (J.L.W.)

Center on Drug and Alcohol Research, Department of Behavioral Science, University of Kentucky, Lexington, Kentucky (S.C.B.); School of Molecular Biosciences, Paul G. Allen School for Global Animal Health (A.G.G.), Integrative Physiology and Neuroscience (A.M.P.), and Department of Psychology (R.M.C.), Washington State University, Pullman, Washington; and RTI International, Research Triangle Park, North Carolina (J.L.W.)