1. Cochrane handbook for systematic reviews of interventions;Higgins,2019
2. Systems to rate the strength of scientific evidence;West;Evid Rep Technol Assess (Summ),2002
3. Evidence based medicine: what it is and what it isn't;Sackett;BMJ,1996
4. Canadian Task Force on Preventive Health Care. New grades for recommendations from the canadian task force on preventive health care;CMAJ,2003
5. Grade guidelines: 1. Introduction—Grade evidence profiles and summary of findings tables;Guyatt;J Clin Epidemiol,2011