[1] Emma Kinderziekenhuis AMC, Dept Pediat Hematol, Amsterdam, Netherlands
[2] Univ Amsterdam, Acad Med Ctr, Dept Immunopathol, Sanquin Res & Landsteiner Lab, NL-1105 AZ Amsterdam, Netherlands
[3] Univ Amsterdam, Acad Med Ctr, Dept Blood Cell Res, Sanquin Res & Landsteiner Lab, NL-1105 AZ Amsterdam, Netherlands