incubation of normal human bone marrow under similar conditions failed to affect growth of granulocyte-macrophage colony-forming cell units , burst-forming erythroid units , or multipotential erythroid-granulocyte-megakaryocyte-macrophage colony-forming hematopoietic progenitor cells units .
C0007634
cell
C0018956
hematopoietic progenitor cells