Figure 4.
The combined effects of influencing factors (the effect by simultaneously changing two factors) on free payload tumor delivery efficiency (ID%) in well-diffused tumor. The colors represent the free payload ID%. The red circles represent Doxil in typical solid breast tumors. BP: tumor blood perfusion; CL: nanoparticle systemic clearance; DC: the nanoparticle diffusion coefficient in the tumor extracellular matrix; VP: nanoparticle vascular permeability; RC: the nanoparticle release constant in the tumor extracellular matrix.