1. Department of Experimental Immunohematology Sanquin Research and Landsteiner Laboratory, Amsterdam UMC, University of Amsterdam Amsterdam The Netherlands
2. Department of Immunohematology Diagnostics Sanquin Diagnostic Services Sanquin The Netherlands
3. Central Diagnostic Laboratory Maastricht University Medical Centre Maastricht The Netherlands
4. Department of Neurology Amsterdam UMC Amsterdam The Netherlands
5. Department of Haematology Erasmus University Medical Center Rotterdam The Netherlands
6. Department of Clinical Chemistry Radboud University Medical Center Nijmegen The Netherlands
7. Department of Hematology Leiden University Medical Center Leiden The Netherlands
8. Department of Clinical Epidemiology Leiden University Medical Center Leiden The Netherlands