IL-2 activated NK cell immunotherapy of three children after haploidentical stem cell transplantation. - Koehl,U.; Sorensen,J.; Esser,R.; Zimmermann,S.; Gruttner,H.P.; Tonn,T.; Seidl,C.; Seifried,E.; Klingebiel,T.; Schwabe,D. (Blood Cells Mol Dis, 2004)