1. Department of Safety, Chemistry and Biomedical Laboratory Sciences, Western Norway University of Applied Sciences, 5528 Haugesund, Norway
2. Department of Veterinary Population Medicine, College of Veterinary Medicine, University of Minnesota, Minneapolis, MN 55108, USA
3. Department of Biological Sciences, University of Bergen, 5006 Bergen, Norway
4. NORCE Norwegian Research Centre, 5008 Bergen, Norway