Institution: | a Centro de Investigación en Sanidad Animal INIA, Valdeolmos, 28130 Madrid, Spain b Institute of Virology and Immunoprophylaxis, CH-3147 Mittelhäusern, Switzerland c Central Veterinary Institute ID-DLO, PO BOX 65, 8200 AB Lelystad, Netherlands d Department of Microbiology and Immunology, Finch University of Health Sciences, The Chicago Medical School, North Chicago, IL 60064, USA e Department of Anatomy and Physiology, Kansas State University, Manhattan, KS 66506, USA f Department of Veterinary Pathobiology, University of Minnesota, St. Paul, MN 55108, USA |