1. Department of Food and Nutrition, Faculty of Agriculture and Forestry, University of Helsinki, P.O. Box 66, FI-00014, Finland
2. Helsinki Institute of Sustainability Science, University of Helsinki, P.O. Box 65, FI-00014, Finland
3. Department of Chemistry, Faculty of Science, University of Helsinki, P.O. Box 55, FI-00014, Finland
4. VTT, Technical Research Centre of Finland, P.O. Box 1000, FIN-02044 VTT, Finland