%0 Letter %T The variable biological signature of refractory cytopenia of childhood (RCC), a retrospective EWOG-MDS study. %A de Winter DTC %A Langerak AW %A Te Marvelde J %A Dworzak MN %A De Moerloose B %A StarĂ½ J %A Locatelli F %A Hasle H %A de Vries ACH %A Schmugge M %A Niemeyer CM %A van den Heuvel-Eibrink MM %A van der Velden VHJ %J Leuk Res %V 108 %N 0 %D 09 2021 %M 34301409 %F 3.715 %R 10.1016/j.leukres.2021.106652 %X