1. Medical Microbiology & Immunology Department, St Antonius Hospital Nieuwegein, Nieuwegein, The Netherlands
2. National Institute for Health and Welfare, Helsinki, Finland
3. Statens Serum Institut, Copenhagen, Denmark
4. Public Health England, Public Health Laboratory, Manchester, United Kingdom
5. Public Health Agency of Sweden, Stockholm, Sweden
6. Reinier HAGA MDC, Delft, The Netherlands
7. Quest Diagnostics Infectious Disease, San Juan Capistrano, California, USA
8. National Institute of Public Health and the Environment (RIVM), Bilthoven, The Netherlands
9. Norwegian Institute of Public Health, Oslo, Norway
10. University College Roosevelt, Middelburg, The Netherlands