- Dr Jarmo Oksi, Turku University, Department of Medical Microbiology, Kiinamyllynkatu 13, FIN-20520 Turku, Finland. Fax 00358 2 2330008; email:
- Received May 20, 1997
- Revised September 29, 1997
- Accepted November 21, 1997
- First published May 1, 1998.
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