title: Pitfalls in case-control studies of vaccine effectiveness.
authors.forename: Matthew R
authors.initials: MR
authors.lastname: Moore
authors.forename: Katherine
authors.initials: K
authors.lastname: O'Brien
authors.forename: J Pekka
authors.initials: JP
authors.lastname: Nuorti
authors.forename: Thomas
authors.initials: T
authors.lastname: Hennessy
mesh_terms: D015982:Bias; D016022:Case-Control Studies; D006801:Humans; D011008:Pneumococcal Infections / Q000453:epidemiology / Q000517:prevention & control*; D022242:Pneumococcal Vaccines; D012307:Risk Factors
chemical_list: D022242:Pneumococcal Vaccines