title: Pneumococcal vaccination of the elderly: do we need another trial?
authors.forename: E
authors.initials: E
authors.lastname: Hak
authors.forename: D E
authors.initials: DE
authors.lastname: Grobbee
authors.forename: G A
authors.initials: GA
authors.lastname: van Essen
authors.forename: E
authors.initials: E
authors.lastname: Buskens
authors.forename: T J
authors.initials: TJ
authors.lastname: Verheij
mesh_terms: D000368:Aged; D001428:Bacterial Vaccines / Q000276:immunology*; D002986:Clinical Trials as Topic; D006801:Humans; D009426:Netherlands; D011008:Pneumococcal Infections / Q000517:prevention & control*; D013296:Streptococcus pneumoniae / Q000276:immunology*
chemical_list: D001428:Bacterial Vaccines