1. National Food Institute, Technical University of Denmark; Mørkhøj Bygade 19 DK-2860 Søborg Denmark
2. School of Natural Sciences, National University of Ireland, Galway; University Rd. Galway City Ireland
3. Nofima Mat, Norwegian Food Research Institute; Osloveien 1, 1430 Ås Norway
4. National Veterinary Institute; SE-751 89 Uppsala Sweden