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History
- Received November 18, 1998
- Revision received June 21, 1999
- Accepted July 2, 1999
- First published September 15, 1999.
- Version of record published September 15, 1999.
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Copyright © 1999 Society for Neuroscience
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Disclosures
- Received November 18, 1998.
- Revision received June 21, 1999.
- Accepted July 2, 1999.
This study was supported by National Institute on Aging Grants AG07735 and AG15947. I thank Dr. A. Savonenko for excellent statistical consulting and M. Barra, D. Grinnell, M. Mooney, and T. Stiefel for their assistance with behavioral testing and data analyses.
Correspondence should be addressed to Dr. Alicja L. Markowska, Department of Psychology, Johns Hopkins University, Baltimore, MD 21218.
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