- Dr Niels Andreasen, Department of Rehabilitation, Piteå River Valley Hospital, PO Box 715, S-941 28 Piteå, Sweden. Telephone 0046 911 75375; fax 0046 911 75052; email:
- Received March 4, 1997
- Revised August 13, 1997
- Accepted August 29, 1997
- First published March 1, 1998.
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