1. Department of Production Animal Clinical Sciences, Section of Experimental Biomedicine, NMBU-School of Veterinary Science, Oslo, Norway
2. Department of Administration, Lab Animal Unit, National Institute of Occupational Health, Oslo, Norway
3. Department of Food Safety and Infection Biology, Section of Pharmacology and Toxicology, NMBU-School of Veterinary Science, Oslo, Norway
4. Department of Environmental Exposure and Epidemiology, Division for Infection Control, and Environmental Health, Norwegian Institute of Public Health, Oslo, Norway
5. Department of Basic Sciences and Aquatic Medicine, Section of Biochemistry and Physiology, NMBU-School of Veterinary Science, Oslo, Norway