IKZF1 DELETIONS ARE INDEPENDENT PROGNOSTIC FACTOR IN PEDIATRIC B-CELL PRECURSOR ACUTE LYMPHOBLASTIC LEUKEMIA oleh G. A. Tsaur, A. Е. Druy, A. G. Solodonikov, A. M. Popov, A. P. Shapochnik, L. V. Vakhonina, А. А. Vlasova, Т. О. Riger, T. Yu. Verzhbitskaya, Yu. V. Olshanskaya, E. V. Shorikov, О. R. Arakaev, L. I. Saveliev, L. G. Fechina