Antimalarial activity of some plants traditionally used in treatment of malaria in Kwale district of Kenya - Muthaura, C N; Rukunga, G M; Chhabra, S C; Omar, S A; Guantai, A N; Gathirwa, J W; Tolo, F M; Mwitari, P G; Keter, L K; Kirira, P G; Kimani, C W; Mungai, G M; Njagi, E NM (J Ethnopharmacol, 2007)