Defining the in vivo phenotype of artemisinin-resistant falciparum malaria: a modelling approach by White, L, Flegg, J, Phyo, A, Wiladpai-ngern, J, Bethell, D, Plowe, C, Anderson, T, Nkhoma, S, Nair, S, Tripura, R, Stepniewska, K, Pan-Ngum, W, Silamut, K, Cooper, B, Lubell, Y, Ashley, E, Nguon, C, Nosten, F, White, N, Dondorp, A