1. Department of Immunopathology Sanquin Research Amsterdam and Landsteiner Laboratory Amsterdam University Medical Center University of Amsterdam Amsterdam The Netherlands
2. Department of Hematology Amsterdam University Medical Center University of Amsterdam Amsterdam The Netherlands
3. Emma Children's Hospital Department of Pediatric Immunology, Rheumatology and Infectious Diseases Amsterdam University Medical Center Amsterdam The Netherlands
4. Department of Hematology and Central Hematology Laboratory, Inselspital Bern University Hospital University of Bern Bern Switzerland
5. Department for BioMedical Research University of Bern Bern Switzerland