1. Department of Biology, Natural Product Research
Laboratories, Joensuu, University of Eastern Finland, P.O. Box 111, FI-80101 Joensuu,
Finland
2. Department
of Biosciences, University of Eastern Finland, P.O.
Box 1627, FI-70211, Kuopio, Finland
3. AgriFoodResearch Finland, 31600 Jokioinen, Finland