1. Evidence based medicine: What is it and what it isn’t;Sackett;BMJ,1996
2. New evidence pyramid;Murad;Evid Based Med,2016
3. Association between analytic and estimates of treatment outcomes in meta-analyses;Dechartres;JAMA,2014
4. Meta-analysis as evidence: Building a better pyramid;Berlin;JAMA,2014
5. Methodological quality (risk of bias) assessment tools for primary and secondary medical studies: What are they and which is better?;Ma;Mil Med Res,2020