Fig. 6From: Modified Fe3O4 Magnetic Nanoparticle Delivery of CpG Inhibits Tumor Growth and Spontaneous Pulmonary Metastases to Enhance ImmunotherapySafety and toxicity evaluation of FeNP/CpG formulation. (a) Body weight changes in NS, FeNP, CpG, and FeNP/CpG groups. b The section of the heart, liver, spleen, lung, and kidney in each group was collected and stained with H&E staining. No significantly pathological changes were observed in any group (magnification, × 200)Back to article page