Fig. 6

A The content of Fe element in mice urine and faces after injection of FeS-Dox@bLf. B Biological distribution of Fe in major organs, and (C) Histological observation of treated breast tumor tissues and major organs include of heart, lung, liver and spleen visualized using H&E staining. ^a,b,c,d,eLS means with different letters in superscripts are different at ^*P < 0.05. Statistical differences were measured at level of ^**P < 0.01, and ^***P < 0.001