IL17A and acquired polycythemia vera: In addition, different subsets of circulating γδ T cells can be discriminated in healthy individuals based on CD3 and/or TCR expression levels: a larger subset of γδ T cells expressing intermediate levels of TCR (hereafter CD3+γδTCRint), and a smaller fraction of γδ T cells expressing high levels of TCR (CD3+γδTCRhigh), the latter containing IL-17+δ1/δ3+ effectors (22, 23), but no data regarding the variance between these γδ T cell subsets currently exists for PV.