PMID: 21402712
Shi Z, Tiwari AK, Shukla S, Robey RW, Singh S, Kim IW, Bates SE, Peng X, Abraham I, Ambudkar SV, Talele TT, Fu LW, Chen ZSSildenafil reverses ABCB1- and ABCG2-mediated chemotherapeutic drug resistance.
Cancer Res. 2011 Apr 15;71(8):3029-41. Epub 2011 Mar 14., 2011-04-15 [PubMed]