- Professor DH Miller, NMR Research Unit, The Institute of Neurology, Queen Square, London WC1N 3BG, UK. Telephone 0044 171 837 3611; fax 0044 171 919 5616.
- Received August 8, 1997
- Revised November 5, 1997
- Accepted November 11, 1997
- First published July 1, 1998.
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