ABCB7 and myelodysplastic syndrome: The expression levels of ABCB7 and MAP3K7 were compared among SF3B1WT-, SF3B1K700E-, and SF3B1non-K700E-MDS patients in both whole cohort and subgroups (Refractory anemia [RA] and RA with ring sideroblasts [RARS]) (see Supplementary Fig. S29–30 online).