Sildenafil Enhances the Anticancer Activity of Paclitaxel in an ABCB1-Mediated Multidrug Resistance Xenograft Mouse Model. Journal of Cancer Research Updates, [S. l.], v. 3, n. 3, p.  169–173, 2014. DOI: 10.6000/1929-2279.2014.03.03.7. Disponível em: https://www.neoplasiaresearch.com/index.php/jcru/article/view/566. Acesso em: 27 apr. 2026.