Reversal of P-Glycoprotein-Mediated Drug Efflux by Eudesmin from Haplophyllum perforatum and Cytotoxicity Pattern versus Diphyllin, Podophyllotoxin and Etoposide - Lim, Suzanne; Grassi, Jérôme; Akhmedjanova, Valentina; Debiton, Eric; Balansard, Guy; Beliveau, Richard; Barthomeuf, Chantal (Planta Medica, 2007)