Where chloroquine still works: the genetic make-up and susceptibility of Plasmodium vivax to chloroquine plus primaquine in Bhutan by Wangchuk, S, Drukpa, T, Penjor, K, Peldon, T, Dorjey, Y, Dorji, K, Chhetri, V, Trimarsanto, H, To, S, Murphy, A, von Seidlein, L, Price, R, Thriemer, K, Auburn, S