hydrocortisone ( 1 and 5 microgram per ml ) and insulin ( 1,5 and 10 microgram per ml ) had no effect on the growth of the cells . beta-retinyl acetate inhibited growth rate and cell yield at a concentration of 5 microgram per ml but was not growth-inhibitory at lower concentrations .
C0007595
growth of
C0007634
cell