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. 2018 Dec 22;8(12):e022133. doi: 10.1136/bmjopen-2018-022133

Figure 2.

Figure 2

Quality assessment of the included studies according to Cochrane Collaboration’s tools for randomised controlled trials (RCTs) and A Cochrane Risk Of Bias Assessment Tool: for Non-Randomized Studies of Interventions tool for cohort studies and quasi-RCTs.