<p>Flowchart representing the methodology employed in the selection of studies.</p
<p>Flowchart shows the application of study inclusion and exclusion criteria.</p
<p>Flowchart depicting the main steps of the simulation procedure used in the present study.</p
<p>Flowchart of the identification, screening, and inclusion/exclusion of studies.</p
<p>Flowchart showing the study selection procedure for identified and included articles.</p
<p>Flowchart showing the details of selection of study sites and study subjects.</p
<p>Flowchart describing the selection of studies included in the meta-analyses.</p
<p>The flowchart was used to illustrate how the study population was selected.</p
<p>Flowchart of the Selection Process for Studies Included in the Systematic Review.</p
<p>Flowchart of identification and selection of studies for the systematic review.</p
<p>Flowchart showing the selection of studies for inclusion in the meta-analysis.</p
<p>Flowchart describing the systematic literature search and study selection process.</p
<p>Flowchart describing the systematic literature search and study selection process.</p
<p>The flowchart of selecting procedure and the exclusive reason of studies are summarized.</p
<p>The flowchart of selecting procedure and the exclusive reasons of studies are summarized.</p
<p>Flowchart for selection of studies and age contrasts in the present study.</p
<p>Flowchart shows the application of study inclusion and exclusion criteria.</p
<p>Flowchart depicting the main steps of the simulation procedure used in the present study.</p
<p>Flowchart of the identification, screening, and inclusion/exclusion of studies.</p
<p>Flowchart showing the study selection procedure for identified and included articles.</p
<p>Flowchart showing the details of selection of study sites and study subjects.</p
<p>Flowchart describing the selection of studies included in the meta-analyses.</p
<p>The flowchart was used to illustrate how the study population was selected.</p
<p>Flowchart of the Selection Process for Studies Included in the Systematic Review.</p
<p>Flowchart of identification and selection of studies for the systematic review.</p
<p>Flowchart showing the selection of studies for inclusion in the meta-analysis.</p
<p>Flowchart describing the systematic literature search and study selection process.</p
<p>Flowchart describing the systematic literature search and study selection process.</p
<p>The flowchart of selecting procedure and the exclusive reason of studies are summarized.</p
<p>The flowchart of selecting procedure and the exclusive reasons of studies are summarized.</p
<p>Flowchart for selection of studies and age contrasts in the present study.</p
<p>Flowchart shows the application of study inclusion and exclusion criteria.</p
<p>Flowchart depicting the main steps of the simulation procedure used in the present study.</p
<p>Flowchart of the identification, screening, and inclusion/exclusion of studies.</p
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