A randomized comparison of chloroquine versus dihydroartemisinin-piperaquine for the treatment of Plasmodium vivax infection in Vietnam per Thuan, PD, Ca, NTN, Toi, PV, Nhien, NTT, Thanh, NV, Anh, ND, Phu, NH, Thai, CQ, Thai, LH, Hoa, NT, Dong, LT, Loi, MA, Son, DH, Khanh, TTN, Dolecek, C, Nhan, HT, Wolbers, M, Thwaites, G, Farrar, J, White, NJ, Hien, TT