1. Faculty of Veterinary Medicine, University of Montreal, Groupe de Recherche sur les Maladies Infectieuses en Production Animale and Swine and Poultry Infectious Diseases Research Center, Saint-Hyacinthe, Quebec, Canada (Lacouture, Corsaut, Gottschalk)
2. National Institute of Animal Health, National Agriculture and Food Research Organization, Tsukuba, Japan (Okura, Takamatsu)
3. The United Graduate School of Veterinary Sciences, Gifu University, Gifu, Japan (Takamatsu)