Role of Human Placental Efflux Transporter P-Glycoprotein in the Transfer of Buprenorphine, Levo-α-Acetylmethadol, and Paclitaxel - Nekhayeva, Ilona A; Nanovskaya, Tatiana N; Hankins, Gary D V; Ahmed, Mahmoud S (American Journal of Perinatology, 2006)