Directional selection at the pfmdr1, pfcrt, pfubp1, and pfap2mu Loci of Plasmodium falciparum in Kenyan children treated With ACT by Henriques, G, Hallett, RL, Beshir, KB, Gadalla, NB, Johnson, RE, Burrow, R, DA van Schalkwyk, Sawa, P, Omar, SA, Clark, TG, Bousema, T, Sutherland, CJ