TF and erythroleukemia: Transferrin coated liposomes co-encapsulating Doxorubicin and Verapamil exhibited 5 and 3-fold cytotoxicity in Doxorubicin-resistant human erythroleukemia K562 cells compared to non-targeted liposomes and transferrin targeted liposomes with Doxorubicin alone respectively (Wu et al., 2007).