The Yeoh et al. [22] data set is a acute lymphoblastic leukemia (ALL) study that consists of six types of pediatric ALL subtypes: 43 T-cell lineage ALL (T-ALL), 27 E2A-PBX1, 79 TEL-AML1, 20 MLL rearrangements, 15 BCR-ABL, and 64 hyperdiploid karyotypes with more than 50 chromosomes (HK50). The gene discussed is BCR; the disease is acute lymphoblastic leukemia.