Cytology of cells proliferated from a single CD34⁺/Kit⁺ cell of patients with SCN. Single CD34⁺/Kit⁺ cells were cultured in the presence of SF, FL, and, IL-3 with (B) or without (A) G-CSF according to the description in Table 4. Some of the proliferating clones were picked, centrifuged onto a slide, and stained with Wright-Giemsa.