Affiliation: | 1. European Program for Public Health Microbiology Training, European Centre for Disease Prevention and Control, Stockholm, Sweden 2. Department of Infectious Disease Surveillance and Control, National Institute for Health and Welfare, Helsinki, Finland 3. Faculty of Medicine, University of Helsinki, Helsinki, Finland 4. Helsinki University Central Hospital Laboratory, Helsinki, Finland 5. Faculty of Veterinary Medicine, University of Helsinki, Helsinki, Finland
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