- Dr Mario-Ubaldo Manto, Service de Neurologie, Fonds National de la Recherche Scientifique, Hôpital Erasme-ULB, 808 Route de Lennik, 1070 Bruxelles, Belgium. Telephone 0032 2 555 67 47; fax 0032 2 555 39 42.
- Received August 13, 1997
- Revised February 19, 1998
- Accepted February 24, 1998
- First published September 1, 1998.
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