Box and whisker plots showing the effect of 0.1

<p> <b>mM DEM in presence and absence of 10 mM GSH on proliferation of PE and CTL UC fibroblasts under 4% (A) and 20% O₂ (B) conditions.</b> Each line had been maintained under 4% O₂ conditions for five passages prior to the experiment. Cell lines were in three groups: CTL (#7, 8, 9, 10), PE O₂ sensitive (O₂-s; G, I, J, M) that had not formed outgrowths under 20% O₂, PE O₂ non-sensitive (O₂-n; D, H, L) that had formed outgrowths under 20% O_2. At p 6, 20,000 cells were dispensed into wells of 6-well plates to begin the treatments. Cells were counted at 72 h. Data are presented as cell number after treatment/cell number with no treatment (*P≤0.05; **P≤0.01; ***P≤0.001).