Corrigendum to "Persistence of bactericidal antibodies following booster vaccination with 4CMenB at 12, 18 or 24 months and immunogenicity of a fifth dose administered at 4 years of age-a phase 3 extension to a randomised controlled trial" [Vaccine 35 (2017) 395–402]. Issue 24 (31st May 2017) - Iro, Mildred A.; Snape, Matthew D.; Voysey, Merryn; Jawad, Sena; Finn, Adam; Heath, Paul T.; Bona, Gianni; Esposito, Susanna; Diez-Domingo, Javier; Prymula, Roman; Odueyungbo, Adefowope; Toneatto, Daniela; et al.