1. Department of Psychological and Brain Sciences, Johns Hopkins University (C.A.C., G.F.B.), Baltimore, Maryland 21218
2. Center for Cellular and Molecular Neurobiology, Research Group in Behavioral Neuroendocrinology, University of Liege (C.A.C., M.B., C.D., J.B.), B-4020 Liege, Belgium
3. Department of Experimental Pharmacology, Medical School, University of Athens (C.D., Z.P.-D.), 11527 Athens, Greece