121:111-120 ) that treatment of human fibroblasts , planted at a density of 2x10 ( 3 ) cells/cm ( 2 ) , with purified human fibroblasts interferon ( 640 u/ml ) for 3 d at 37 degrees c decreases the overall rate of cell proliferation to 35-40 percent of the control value .
C0016030
fibroblasts
C0007634
cells