For the Yeoh et al [13] dataset, samples were drawn from leukemias with rearrangements involving BCR-ABL, E2A-PBX1, TEL-AML1, rearrangements of MLL gene, hyperdiploid karyotope (more than 50 chromosomes) and T lineage leukemias (T-ALL). Here, PBX1 is linked to acute lymphoblastic leukemia.