Randomised double-blind placebo-controlled trial of SPf66 malaria vaccine in children in northwestern Thailand by Nosten, F, Luxemburger, C, Kyle, D, Ballou, W, Wittes, J, Wah, E, Chongsuphajaisiddhi, T, Gordon, D, White, N, Sadoff, J, Heppner, D, Bathe, K, Blood, J, Brockman, A, Cobley, U, Hacking, D, Hogg, D, U, K, Maelankiri, L, Chuanak, N, Permpanich, B, Price, R, Raimond, D, Schabenberger, O, Singharaj, P