Randomised controlled trials for Ebola: practical and ethical issues. by Adebamowo, C, Bah-Sow, O, Binka, F, Bruzzone, R, Caplan, A, Delfraissy, J, Heymann, D, Horby, P, Kaleebu, P, Tamfum, J, Olliaro, P, Piot, P, Tejan-Cole, A, Tomori, O, Toure, A, Torreele, E, Whitehead, J