1. Department of Plant and Environmental Sciences, University of Copenhagen, Thorvaldsensvej 40, 1871 Frederiksberg C, Denmark
2. Department of Food Science—Food Chemistry and Technology, Aarhus University, Agro Food Park 48, 8200 Aarhus N, Denmark
3. KMC, Kartoffelmelcentralen, Amba, 7330 Brande, Denmark
4. Department of Environmental Science, Aarhus University, Frederiksborgvej 399, P.O. Box 358, 4000 Roskilde, Denmark