University of Groningen - University Medical Center Groningen (UMCG), Albert Schweitzer Hospital, Erasmus University Rotterdam (EUR) - Clinical Trial Center, University of Groningen - University Medical Center Groningen (UMCG), Medical Center Leeuwarden, Medisch Spectrum Twente, University of Groningen - University Medical Center Groningen (UMCG), University of Groningen - Groningen Research Institute for Asthma and COPD, Meander Medical Center, Tjongerschans, Antonius Zorggroep - Antonius Hospital Sneek, Deventer Ziekenhuis - Deventer Hospital, Maastricht University - Medical Center, Medical Center Leeuwarden, University of Groningen - Department of Hematology and Oncology, Independent, University of Groningen - Department of Pulmonary Diseases, Erasmus University Rotterdam (EUR) - Department of Hematology, Albert Schweitzer Hospital, University of Groningen - University Medical Center Groningen (UMCG), University of Groningen - Department of Epidemiology, Albert Schweitzer Hospital, Medical Center Leeuwarden, University of Groningen - University Medical Center Groningen (UMCG), University of Groningen - University Medical Center Groningen (UMCG), University of Groningen - University Medical Center Groningen (UMCG), University of Groningen - University Medical Center Groningen (UMCG), University of Groningen - University Medical Center Groningen (UMCG) and University of Groningen - Department of Hematology and Oncology

University of Amsterdam, Academic Medical Center, Department of Hematology, University of Amsterdam, Academic Medical Center, Department of Hematology, University of Amsterdam - Department of Clinical Epidemiology, Biostatistics and Bioinformation, Erasmus University Rotterdam (EUR) - Department of Hematology, University of Groningen - Department of Hematology and Oncology, National Institute for Public Health and the Environment (RIVM) - Department for Immunology of Infectious Diseases and Vaccination (IIV), National Institute for Public Health and the Environment (RIVM) - Department of Immune Surveillance, University of Amsterdam, Academic Medical Center, Department of Hematology, University of Amsterdam - Amsterdam Institute for Infection and Immunity, VU University Amsterdam - Department of Hematology, University of Amsterdam - Amsterdam Institute for Infection and Immunity, University of Amsterdam - Amsterdam Institute for Infection and Immunity, National Institute of Public Health and the Environment, University of Amsterdam - Central Diagnostic Laboratory, University of Amsterdam - Amsterdam Institute for Infection and Immunity, Free University, Amsterdam - Medical Immunology Laboratory, University of Amsterdam - Amsterdam Institute for Infection and Immunity, Netherlands Comprehensive Cancer Organisation, National Institute for Public Health and the Environment (RIVM) - Centre for Infectious Disease Control, National Institute for Public Health and the Environment (RIVM) - Department for Immunology of Infectious Diseases and Vaccination (IIV), Leiden University, Medical Center (LUMC), Department of Hematology, VU University Amsterdam - Department of Hematology, University of Groningen - Department of Hematology and Oncology, Erasmus University Rotterdam (EUR) - Department of Hematology, University of Amsterdam - Department of Medical Microbiology and Infection Prevention, University of Amsterdam - Department of Infectious Diseases, University of Amsterdam, Academic Medical Center, Department of Hematology, University of Amsterdam, Academic Medical Center, Department of Hematology, VU University Amsterdam - Department of Hematology and Independent