title: Sample size considerations in vaccine trials.
authors.affiliation: Department of Biostatistics, University of Pittsburgh, Graduate School of Public Health, PA 15213.
authors.forename: H E
authors.initials: HE
authors.lastname: Rockette
mesh_terms: D002986:Clinical Trials as Topic; D006801:Humans; D010033:Otitis Media / Q000453:epidemiology / Q000517:prevention & control*; D012494:Sampling Studies; D014611:Vaccination