1 Center for Benign Haematology, Thrombosis and Haemostasis, Van Creveldkliniek, University Medical Centre (UMC) Utrecht, Utrecht University, Utrecht, the Netherlands.
2 Department of Rheumatology & Clinical Immunology, University Medical Center (UMC) Utrecht, Utrecht University, Utrecht, the Netherlands.
3 Department of Hematology, Cancer Center, University Medical Center (UMC) Utrecht, Utrecht University, Utrecht, the Netherlands.