[1] Leiden Univ, Med Ctr, Dept Paediat, Div Immunol Haematol Oncol Bone Marrow Transplant, NL-2300 RC Leiden, Netherlands
[2] Womens & Childrens Hosp, Dept Haematol Oncol, Adelaide, SA, Australia
[3] Leiden Univ, Med Ctr, Dept Dermatol, NL-2300 RC Leiden, Netherlands
[4] DCOG, The Hague, Netherlands
[5] Sophia Childrens Univ Hosp, Erasmus MC, Rotterdam, Netherlands
[6] Vrije Univ Amsterdam, Med Ctr, Amsterdam, Netherlands