<p>Risk of bias: 0 = low; 1 = moderate; 2 = high.</p><p>Risk of bias from the six articles selected for the qualitative analysis.</p
<p>Note: Low risk of bias is indicated by green colour, moderate risk of bias by yellow colour and h...
<p>This figure was the summery for risk of bias within six studies. It was formed using Revman 5.2. ...
<p>Risk of bias graph: Each risk of bias assessment was presented as the percentage across all the i...
<p><i>Note</i>. +: low risk of bias;?: unclear risk of bias;-: high risk of bias.</p><p>Risk of bias...
<p>(A) Risk of bias graph: review authors’ judgments about each item’s risk of bias item presented a...
<p>H, high risk; L, low risk; U, unclear risk.</p><p>Risk of Bias Assessment.</p
<p>Each risk of bias item is presented as the percentage across all the included studies, which indi...
<p>Two studies were identified as being of a higher design quality. Three studies were identified as...
a, Risk of bias summary: each risk of bias item for each included study; b, risk of bias graph: each...
<p>(A) Summary of the risk of bias in all included 6 studies. (B) Risk of bias graph: judgements abo...
<p>Risk of bias for each criterion for each included study (top) and risk of bias for each criterion...
<p>Risk of bias for this meta-analysis: judgements about each risk of bias item presented as percent...
<p>The risk of bias for the included studies was assessed in our meta-analysis.</p
<p>(B) Risk of bias summary: review authors' judgements about each risk of bias item for each includ...
<p>Red = High risk of bias. Yellow = Moderate risk of bias. Green = Low risk of bias. White = Unknow...
<p>Note: Low risk of bias is indicated by green colour, moderate risk of bias by yellow colour and h...
<p>This figure was the summery for risk of bias within six studies. It was formed using Revman 5.2. ...
<p>Risk of bias graph: Each risk of bias assessment was presented as the percentage across all the i...
<p><i>Note</i>. +: low risk of bias;?: unclear risk of bias;-: high risk of bias.</p><p>Risk of bias...
<p>(A) Risk of bias graph: review authors’ judgments about each item’s risk of bias item presented a...
<p>H, high risk; L, low risk; U, unclear risk.</p><p>Risk of Bias Assessment.</p
<p>Each risk of bias item is presented as the percentage across all the included studies, which indi...
<p>Two studies were identified as being of a higher design quality. Three studies were identified as...
a, Risk of bias summary: each risk of bias item for each included study; b, risk of bias graph: each...
<p>(A) Summary of the risk of bias in all included 6 studies. (B) Risk of bias graph: judgements abo...
<p>Risk of bias for each criterion for each included study (top) and risk of bias for each criterion...
<p>Risk of bias for this meta-analysis: judgements about each risk of bias item presented as percent...
<p>The risk of bias for the included studies was assessed in our meta-analysis.</p
<p>(B) Risk of bias summary: review authors' judgements about each risk of bias item for each includ...
<p>Red = High risk of bias. Yellow = Moderate risk of bias. Green = Low risk of bias. White = Unknow...
<p>Note: Low risk of bias is indicated by green colour, moderate risk of bias by yellow colour and h...
<p>This figure was the summery for risk of bias within six studies. It was formed using Revman 5.2. ...
<p>Risk of bias graph: Each risk of bias assessment was presented as the percentage across all the i...
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