1. Statens Serum Institut, Copenhagen, Denmark
2. Antimicrobial Resistance and Healthcare Associated Infections (AMRHAI) Reference Unit, National Infection Service, Public Health England, London, UK
3. Institut Pasteur, French National Reference Center for E. coli, Shigella and Salmonella, Paris, France
4. National Food Institute, Technical University of Denmark, Kongens Lyngby, Denmark