title: Number of confirmed swine flu cases could be "tip of iceberg".
authors.forename: Adrian
authors.initials: A
authors.lastname: O'Dowd
authors.forename: Fred
authors.initials: F
authors.lastname: Charatan
mesh_terms: D004196:Disease Outbreaks / Q000706:statistics & numerical data*; D014943:Global Health; D006801:Humans; D053118:Influenza A Virus, H1N1 Subtype; D007251:Influenza, Human / Q000453:epidemiology*