| Literature DB >> 8499794 |
Abstract
Three recent articles are examined in which research using the double-blind randomised clinical trial, the case control study, and the quasi-cohort study is described. Understanding the advantages and disadvantages of these methods makes it easier to grasp the pneumococcal vaccine controversy and make an informed choice.Entities:
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Year: 1993 PMID: 8499794 PMCID: PMC2379665
Source DB: PubMed Journal: Can Fam Physician ISSN: 0008-350X Impact factor: 3.275