Figure 7: DOX mean fluorescence intensity of the K562 (A) and K562/AO2 (B) cells incubated with 0.9 w/v % saline, free DOX, DOX-P (DOX equivalent to 5μg/ml) for 15min, 60min and 120 min (mean ± SD, n=6). *p < 0.05 compared with free DOX.