Plasma Plasmodium falciparum Histidine-Rich Protein-2 concentrations in children with malaria infections of differing severity in Kilifi, Kenya by Uyoga, S, Wanjiku, P, Rop, JC, Makale, J, Macharia, AW, Nyutu, GM, Shebe, M, Awuondo, KA, Mturi, N, Woodrow, CJ, Dondorp, AM, Maitland, K, Williams, TN