Fig. 8From: RETRACTED ARTICLE: A Comparative Study of the Toxicity of Polyethylene Glycol–Coated Cobalt Ferrite Nanospheres and NanoparticlesCytotoxicity of PEG-coated cobalt ferrite nanoparticles and nanospheres in L-132 cells (a) and THP-1 cells (b). *P < 0.01 and **P < 0.05 for the two cells compared with untreated controls. The data represent the mean ± S.D of two independent experiments done in triplicateBack to article page