1. Centre for Studies in Behavioral Neurobiology (A.A., W.G.B.), Department of Psychology, Concordia University, Montreal, Quebec, Canada H4B 1R6
2. and Department of Medicine (E.J.F.), Brown University, Providence, Rhode Island 02903
3. Department of Neurology and Neuroscience (T.A.M.), Weill Cornell Medical College, The Rockefeller University, New York, New York 10065
4. Harold and Margaret Milliken Hatch Laboratory of Neuroendocrinology (T.A.M.), The Rockefeller University, New York, New York 10065