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

VU University Amsterdam - Department of Haematology, VU University Amsterdam, University of Groningen - Department of Hematology and Oncology, Erasmus University Rotterdam (EUR) - HOVON Data Center, Utrecht University - University Medical Center (Utrecht), Erasmus University Rotterdam (EUR) - Cancer Institute, KU Leuven - University Hospitals Leuven, University of Groningen, Leiden University - Leiden University Medical Center (LUMC), Leiden University - Leiden University Medical Center (LUMC), Oncology Center Isala, Canisius-Wilhelmina Ziekenhuis, Admiraal de Ruijter Hospital, University of Groningen - University Medical Center Groningen (UMCG), Radboud University Nijmegen - Radboud University Medical Center, Amsterdam UMC, Vrije Universiteit Amsterdam - Department of Radiology & Nuclear Medicine, VU University Amsterdam - Department of Hematology, VU University Amsterdam and University of Amsterdam, Academic Medical Center, Department of Hematology

Erasmus University Rotterdam (EUR) - Department of Neuro-Oncology, Counties Manukau District Health Board - Middlemore Hospital, Erasmus University Rotterdam (EUR) - HOVON Data Center, Utrecht University, University Medical Center, Cancer Center, Department of Hematology, Utrecht University - Department of Neurology, Elisabeth-Tweesteden Hospital, Sir Charles Gairdner Hospital, Maastricht University, Medical Center, Department of Hematology, Radboud University Nijmegen - Department of Hematology, VU University Amsterdam - Department of Hematology, Netherlands Cancer Institute, University of Groningen - Department of Hematology and Oncology, University of Melbourne - Royal Melbourne Hospital, Spaarne Gasthuis, Erasmus University Rotterdam (EUR) - Department of Neuro-Oncology, University of Groningen, University of Melbourne - Royal Melbourne Hospital, VU University Amsterdam and Erasmus University Rotterdam (EUR) - Department of Hematology