[1] Uppsala Univ, Dept Womens & Childrens Hlth, Paediat Oncol, Uppsala, Sweden
[2] Uppsala Univ, Dept Immunol Genet & Pathol Expt & Clin Oncol, Uppsala, Sweden
[3] Karolinska Inst, Dept Womens & Childrens Hlth, Stockholm, Sweden
[4] Uppsala Univ, Dept Immunol Genet & Pathol, Unit Pathol, Uppsala, Sweden