Possible Artefacts in the in vitro Determination of Antimalarial Activity of Natural Products that Incorporate into Lipid Bilayer: Apparent Antiplasmodial Activity of Dehydroabietinol, a Constituent of Hyptis suaveolens - Ziegler, Hanne L; Jensen, Thomas Høgh; Christensen, Jette; Stærk, Dan; Hägerstrand, Henry; Sittie, Archibald A; Olsen, Carl Erik; Staalsø, Trine; Ekpe, Patrick; Jaroszewski, Jerzy W (Planta Medica, 2002)