title: Meta-analysis: its role in medical research and in assessment of the association between low levels of cholesterol and excess mortality.
authors.forename: P C
authors.initials: PC
authors.lastname: O'Brien
mesh_terms: D015982:Bias; D002784:Cholesterol / Q000097:blood*; D006801:Humans; D015201:Meta-Analysis as Topic; D009026:Mortality; D012106:Research; D012107:Research Design
chemical_list: D002784:Cholesterol