Table S3 presents the haplotype analysis results for rs642321 and rs3805500. Investigations among patients with ALL indicated significantly higher WBC at diagnosis for GG carriers of rs3805500 (68,540 vs. 31,681; p = 0.037). In the same context, homozygotes for the minor allele in rs642321 were diagnosed at an older age (10.95 vs. 6.24; p = 0.002). When focusing on ALL subtypes, no patient with hyperdiploidy and all patients with TCF3::PBX1 were homozygotes for the minor allele in rs642321 (Fisher–Freeman–Halton exact test; p = 0.051). Here, PBX1 is linked to acute lymphoblastic leukemia.