1. Department of Restaurant and Culinary Arts, Örebro University, Grythyttan, Sweden.
2. Department of Clinical Medicine, Örebro University Hospital, Örebro, Sweden.
3. Department of Environmental Assessment, SLU, Uppsala, Sweden.
4. Department of Clinical Microbiology, Örebro University Hospital, Örebro, Sweden.
5. Department of Bacteriology, Malmö University Hospital, Malmö, Sweden.
6. The Swedish Institute for Infectious Disease Control and MTC, Karolinska Institutet, Solna, Sweden.
7. Centre National des Listeria, Institut de Microbiologie, Lausanne, Switzerland.
8. ICAR Research Complex for Goa, Old Goa, India.
9. AstraZeneca AB, Södertälje, Sweden.
10. Laboratoire des Listeria, Institut Pasteur, Paris, France.
11. Regional Centre for Communicable Disease Control and Prevention, Malmö, Sweden.
12. Centre Pasteur du Cameroun, Yaounde, Cameroon.