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We thank H. Bourne, D. Copenhagen, D. Dixon, and D. Wyllie for their comments on the manuscript and R. Kramer for suggesting the use of Rp-8-CPT-cAMPS. Supported by the National Institutes of Mental Health. M.G.W. was supported by a University of California, San Francisco Chancellor's Fellowship. P.E.C. was supported by the Fogarty International Center of NIH. R.A.N. is a member of the Keck Center for Integrative Neuroscience and the Silvio Conte Center for Neuroscience Research.
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