CD34 and myelodysplastic syndrome: The HSCs and MEPs in the BMMNCs of MDS patients (n = 31) and healthy donors (n = 12) were measured by flow cytometry with the markers of Lin-CD34+CD38-CD45RA-CD123- for HSC and Lin-CD34+CD38+CD45RA-CD123- for MEP (Fig. S1)17.