1 Sanquin Blood Bank, Amsterdam, Netherlands; Department of Laboratory Medicine, Radboud University Medical Center, Nijmegen 6500 HB, Netherlands. Electronic address: dorine.swinkels@radboudumc.nl.
2 Department of Laboratory Medicine, Radboud University Medical Center, Nijmegen 6500 HB, Netherlands; SKML Foundation for Quality Assessment in Laboratory Medicine, Nijmegen, Netherlands.
3 Department of Molecular Hematology, Sanquin Research and Landsteiner Laboratory, Amsterdam, Netherlands.