Department of Basic Sciences and Aquatic Medicine, Faculty of Veterinary Medicine, Norwegian University of Life Sciences, P. O. Box 369 Sentrum, N-0102 Oslo, Norway.
Department of Basic Sciences and Aquatic Medicine, Faculty of Veterinary Medicine, Norwegian University of Life Sciences, P. O. Box 369 Sentrum, N-0102 Oslo, Norway.
Department of Food Safety and Infection Biology, Faculty of Veterinary Medicine, Norwegian University of Life Sciences, P. O. Box 369 Sentrum, N-0102 Oslo, Norway.