How important are comprehensive literature searches and the assessment of trial quality in systematic reviews? Empirical study.
Egger
M
M
Department of Social and Preventive Medicine, University of Berne, Switzerland.
Juni
P
P
Bartlett
C
C
Holenstein
F
F
Sterne
J
J
D002986:Clinical Trials as Topic / Q000592:standards*; D016206:Databases, Bibliographic; D016208:Databases, Factual; D006801:Humans; D016247:Information Storage and Retrieval / Q000379:methods*; D007802:Language; D015201:Meta-Analysis as Topic; D010506:Periodicals as Topic; D012196:Review Literature as Topic