BCR and Hepatomegaly: As expected, the three measurements increased gradually at first but then reversibly with the number of selected features, and reached their maximum values when considering 14 selected features as follows: Age, WBC, Haemoglobin (HB), Platelet (PLT), Peripheral Heterotypic cell (PHC), Lactic Dehydrogenase (LDH), Lymphoblast in Bone Morrow at diagnosis (D0−BM), Lymphoblast in Bone Marrow on Day 33 (D33−BM), Birth Weight (BW), Ferroprotein (FER), Lymphoblast in Bone Marrow on Day 15 (D15−BM), Hepatomegaly (Hepat), Splenomegaly (Splen), and BCR-ABL.