IL37 and Bone marrow hypocellularity: Interestingly, like DADA2, some GATA2 deficiency (GATA2) patients also had lower peripheral blood cell counts but decreased levels of circulating IL-23 (Fig. 2c), suggesting that the connection between circulating IL-23 level and bone marrow status in DADA2 patients is distinct from that in other diseases with bone marrow failure or low peripheral cell count phenotypes.