SSBP2 and acute lymphoblastic leukemia: Other commonly identified JAK2 fusion partners in ALL are BCR::JAK2 (12.8%), ETV6::JAK2 (9.6%), SSBP2 (single stranded DNA binding protein 2/JAK2) (6.4%) and ATF7IP (activating transcription factor 7 interacting protein) (3.2%) (Table 3, Supplementary Table S1) (Roberts et al., 2014a; Roberts K. G. et al., 2017).