National Institute for Public Health and the Environment (RIVM) - Centre for Infectious Disease Control, National Institute for Public Health and the Environment (RIVM) - Centre for Infectious Disease Control, Star-shl Medical Diagnostic Center, Zuyderland Medical Center, Tergooi Medical Center, Rijnstate Hospital, University of Groningen - University Medical Center Groningen, Result Laboratorium, Maastricht University, Haaglanden Medical Center, Erasmus University Rotterdam (EUR), Dijklander Hospital, Public Health Service of Amsterdam, Maasstad Hospital, Isala Zwolle, Meander Medical Centre, Radboud University Nijmegen - Radboud University Medical Center, Deventer Hospital, Regional Public Health Laboratory Kennemerland, Regional Public Health Laboratory Kennemerland, Antonius Hospital, Laboratory for Medical Microbiology and Public Health (LabMicTA), Elisabeth-Tweesteden Hospital, Diakonessen Hospital, Leiden University - Leiden University Medical Center (LUMC), Canisius Wilhelmina Hospital, University of Amsterdam - Amsterdam UMC, National Institute for Public Health and the Environment (RIVM) - Centre for Infectious Disease Control, National Institute for Public Health and the Environment (RIVM) - Centre for Infectious Disease Control, National Institute for Public Health and the Environment (RIVM) and National Institute for Public Health and the Environment (RIVM) - Centre for Infectious Disease Control