Meningococcal B vaccine immunogenicity in children with defects in complement and splenic function by Martinón-Torres, FL, Bernatowska, E, Shcherbina, A, Esposito, S, Szenborn, L, Marti, MC, Hughes, S, Faust, SN, Yu, LM, D’Agostino, D, Calabresi, M, Toneatto, D, Snape, MD