Molecular surveillance for operationally relevant genetic polymorphisms in Plasmodium falciparum in Southern Chad, 2016–2017 by Das, S, Kérah-Hinzoumbé, C, Kebféné, M, Srisutham, S, Nagorngar, T-Y, Saralamba, N, Vongpromek, R, Khomvarn, T, Sibley, CH, Guérin, PJ, Imwong, M, Dhorda, M