- Dr M Pelkonen, University of Kuopio, Department of Public Health and General Practice, P O Box 1627, FIN-70211 Kuopio, Finland
- Received January 9, 2001
- Revision requested March 26, 2001
- Revised June 1, 2001
- Accepted June 20, 2001
- First published September 1, 2001.
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