a number of factors were studied which may have some influence on cell proliferation in general , notably phytohaemagglutinin ( pha ) , which induces lymphocyte colonies in vitro ( rozenszajn et al. , 1974 ) , and endotoxin which has been demonstrated to increase the labelling index of leukemic cells in vivo ( golde et al . ) .
C0596290
cell proliferation
C0007634
the