THY1 and acquired polycythemia vera: In contrast, in patient IF0111 (a patient who had polycythemia vera and was receiving interferon; Table 1), a lower fraction of clonally involved Lin−CD34+CD38− cells were homozygous for JAK2V617F and predominantly had a CD90+CD45RA+ aberrant phenotype (Figure 3B) that has also been reported in other myeloid malignancies (Dimitriou et al., 2016).