1. Institute
of Macromolecular Chemistry, Academy of Sciences of the Czech Republic, 162 06 Prague 6, Czech Republic
2. Department
of Food and Environmental Sciences, University of Helsinki, FI-00014, Helsinki, Finland
3. Institute
of Public Health and Clinical Nutrition, University of Eastern Finland, FI-70211, Kuopio, Finland
4. Academy of Finland, Hakaniemenranta
6, POB 131, FI-00531 Helsinki, Finland