References

• 2009The PRISMA Statement for Reporting Systematic Reviews and Meta-Analyses of Studies That Evaluate Health Care Interventions: Explanation and Elaboration10,345 cited
• 1997Meta-analysis: Principles and procedures2,413 cited
• 1994Systematic Reviews: Identifying relevant studies for systematic reviews2,256 cited
• 2005Effectiveness and efficiency of search methods in systematic reviews of complex evidence: audit of primary sources2,042 cited
• 2009AMSTAR is a reliable and valid measurement tool to assess the methodological quality of systematic reviews1,756 cited
• 2007Tools for assessing quality and susceptibility to bias in observational studies in epidemiology: a systematic review and annotated bibliography1,532 cited
• 1990The Existence of Publication Bias and Risk Factors for Its Occurrence1,413 cited
• 1995Assessing the quality of randomized controlled trials: An annotated bibliography of scales and checklists1,306 cited
• 1991Validation of an index of the quality of review articles788 cited
• 2007External Validation of a Measurement Tool to Assess Systematic Reviews (AMSTAR)569 cited
• 2003The inclusion of reports of randomised trials published in languages other than English in systematic reviews499 cited
• 2002Identification of randomized controlled trials in systematic reviews: accuracy and reliability of screening records340 cited
• 2005Language of publication restrictions in systematic reviews gave different results depending on whether the intervention was conventional or complementary