title: Widening differences in acute otitis media study populations.
authors.forename: Michael
authors.initials: M
authors.lastname: Pichichero
mesh_terms: D002675:Child, Preschool; D005260:Female; D006193:Haemophilus influenzae / Q000502:physiology; D006801:Humans; D007223:Infant; D008297:Male; D001936:Moraxella catarrhalis / Q000502:physiology; D015999:Multivariate Analysis; D010033:Otitis Media / Q000453:epidemiology* / Q000382:microbiology / Q000473:pathology; D013296:Streptococcus pneumoniae / Q000502:physiology; D013297:Streptococcus pyogenes / Q000502:physiology