1. Faculty of Health and Medical Sciences; Department of Veterinary Disease Biology; University of Copenhagen; Frederiksberg C Denmark
2. National Food Institute; Technical University of Denmark; Søborg Denmark
3. National Food Institute; Technical University of Denmark; Lyngby Denmark
4. Department of Chemistry and Bioscience; Aalborg University; Aalborg Denmark
5. BioMar A/S; Mylius Erichsensvej 35; Brande Denmark
6. National Veterinary Institute; Technical University of Denmark; Copenhagen Denmark