[1] Univ Amsterdam, Acad Med Ctr, Emma Childrens Hosp, NL-1105 AZ Amsterdam, Netherlands
[2] Univ Amsterdam, Acad Med Ctr, Dept Exp Immunol, NL-1105 AZ Amsterdam, Netherlands
[3] Univ Hosp Geneva, Div Hematol, Geneva, Switzerland
[4] Erasmus Univ, Dept Immunol, NL-3000 DR Rotterdam, Netherlands