1. Servicio Enterobacterias, Instituto Nacional de Enfermedades Infecciosas, INEI-ANLIS “Carlos G. Malbrán,” Buenos Aires, Argentina
2. State Key Laboratory for Infectious Disease Prevention and Control, National Institute for Communicable Diseases Control and Prevention, Chinese Center for Disease Control and Prevention, Changping, Beijing, China
3. Centro Nacional de Referencia de Bacteriología, Inciensa, Cartago, Costa Rica
4. Gastrointestinal Bacteria Reference Unit, Public Health England, London, England
5. Enteric and Food Microbiology Laboratory, Laboratory Sciences and Services Division, International Center for Diarrheal Disease Research (icddr,b), Dhaka, Bangladesh
6. National Institute for Escherichia and Shigella Reference Unit, Centers for Disease Control and Prevention, Atlanta, Georgia, USA
7. Division of Foodborne, Waterborne and Environmental Diseases, Biostatistics and Information Management Office, NCEZID, Centers for Disease Control and Prevention, Atlanta, Georgia, USA
8. Stanley Ho Centre for Emerging Infectious Diseases, School of Public Health and Primary Care, Faculty of Medicine, The Chinese University of Hong Kong, Hong Kong SAR, China