Reduction in all-cause acute otitis media in children <3 years of age in primary care following vaccination with 10-valent Pneumococcal Haemophilus influenzae protein-D conjugate vaccine: a whole-population study - Sigurdsson, S; Eythorsson, E; Hrafnkelsson, B; Erlendsdóttir, H; Kristinsson, K G; Haraldsson, Á (Clin Infect Dis, 2018)