Development of a glycoconjugate vaccine to prevent meningitis in Africa caused by meningococcal serogroup X. by Micoli, F, Romano, MR, Tontini, M, Cappelletti, E, Gavini, M, Proietti, D, Rondini, S, Swennen, E, Santini, L, Filippini, S, Balocchi, C, Adamo, R, Pluschke, G, Norheim, G, Pollard, A, Saul, A, Rappuoli, R, MacLennan, C, Berti, F, Costantino, P