ABCG2 and cancer: Given the growing use of concomitant chemotherapy and combined antiretroviral therapy (cART) in HIV/AIDS (Mounier et al, 2009), further studies are needed to verify if this phenomenon occurs with other antiretroviral compounds that are substrates for the ABC transporters and other HIV-related and HIV-unrelated cancers in vitro and in vivo in patients administered life-long cART.