- Correspondence to: Dr K Motonaga, Department of Mental Retardation and Birth Defect Research, National Institute of Neuroscience, National Center of Neurology and Psychiatry (NCNP), 4–1–1 Ogawahigashi, Kodaira, Tokyo 187–8502, Japan;
- Accepted September 14, 2001
- First published March 1, 2002.
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