conditioned medium ( cm ) prepared from bone marrow ( bm ) or spleen ( spl ) cells from mice injected with pge2 in doses ranging from 0.0001 to 10 micrograms was found to contain an activity inhibitory to the proliferation of granulocyte-monocyte progenitor cells ( cfu-gm ) .
C0005953
bone marrow
C0018183
monocyte