title: Pneumococcal polysaccharide vaccine effectiveness: study quality must not be ignored.
authors.forename: Caroline
authors.initials: C
authors.lastname: Trotter
authors.forename: Pippa
authors.initials: P
authors.lastname: Scott
authors.forename: Anke
authors.initials: A
authors.lastname: Huss
authors.forename: Matthias
authors.initials: M
authors.lastname: Egger
mesh_terms: D000368:Aged; D006801:Humans; D015201:Meta-Analysis as Topic; D011008:Pneumococcal Infections / Q000517:prevention & control*; D022242:Pneumococcal Vaccines / Q000627:therapeutic use*; D016032:Randomized Controlled Trials as Topic / Q000592:standards; D018074:Vaccines, Conjugate / Q000627:therapeutic use*
chemical_list: C414006:23-valent pneumococcal capsular polysaccharide vaccine; D022242:Pneumococcal Vaccines; D018074:Vaccines, Conjugate