1. European Programme for Intervention Epidemiology Training (EPIET), Stockholm, Sweden
2. National Institute for Health and Welfare (THL), Department of Infectious Disease Surveillance and Control, Helsinki, Finland
3. Helsinki University Hospital, Laboratory Services (HUSLAB), Department of Virology and Immunology, Helsinki, Finland
4. Fimlab Laboratories, Pirkanmaa Hospital District, Tampere, Finland
5. Department of Virology, University of Turku, Turku, Finland
6. Eastern Finland Laboratory Centre Joint Authority Enterprise (ISLAB), Kuopio, Finland
7. United Medix Laboratories Ltd, Espoo, Finland