1. Faculté de Médecine Vétérinaire, University of Montreal, Saint-Hyacinthe, Quebec, Canada.
2. National Center of Infectious and Parasitic Diseases, National Reference Laboratory for Enteric Pathogens,1504 Sofia, Bulgaria.
3. WHO Collaborating Centre for Antimicrobial Resistance in Foodborne Pathogens, Danish Institute for Food and Veterinary Research, DK-1790 Copenhagen V, Denmark.
4. WHO International Salmonella and Shigella Centre, National Institute of Health, Department of Medical Sciences, Ministry of Public Health, Bangkok, Thailand.