Fig. 4From: Usefulness of myeloperoxidase as a biomarker for the ranking of pulmonary toxicity of nanomaterialsThe receiver operating characteristics for the toxicity of chemicals by the concentration of MPO proteins. a Intratracheal instillation. b Inhalation exposure. The area under the curves at 1Â months after exposure following both of intratracheal instillation and inhalation were larger than the other observation timesBack to article page