<p>Uptake of free DOX and DOX-PCL<sub>63</sub>-b-PNVP<sub>90</sub> micelles by tumor cells and organs were studied using fluorescence plate reader (A). Data presented as mean ± SD of triplicate determination, n = 3. Distribution profile of DOX in Tumor cell (B), Spleen (C), Liver (D), Lung (E), Kidney (F), and Heart (G) by FACS analysis, n = 3.</p