<p>Flowchart showing the study selection procedure for identified and included articles.</p
<p>Flow chart showing the selection process of articles and the number in each period.</p
<p>Flowchart shows the application of study inclusion and exclusion criteria.</p
<p>Flowchart of Articles Used to Assess Registration and Selective Reporting.</p
<p>Flowchart representing the methodology employed in the selection of studies.</p
<p>Flowchart showing the details of selection of study sites and study subjects.</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>Flowchart showing the selection of studies for inclusion in the meta-analysis.</p
<p>Flowchart describing the selection of studies included in the meta-analyses.</p
<p>Flowchart of the Selection Process for Studies Included in the Systematic Review.</p
<p>Flowchart of 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>Flowchart illustrating the selection and inclusion process of the SNPs included in our study.</p
<p>Flowchart of identification and selection of studies for the systematic review.</p
<p>The flowchart of selecting procedure and the exclusive reasons of studies are summarized.</p
<p>Flow chart showing the selection process of articles and the number in each period.</p
<p>Flowchart shows the application of study inclusion and exclusion criteria.</p
<p>Flowchart of Articles Used to Assess Registration and Selective Reporting.</p
<p>Flowchart representing the methodology employed in the selection of studies.</p
<p>Flowchart showing the details of selection of study sites and study subjects.</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>Flowchart showing the selection of studies for inclusion in the meta-analysis.</p
<p>Flowchart describing the selection of studies included in the meta-analyses.</p
<p>Flowchart of the Selection Process for Studies Included in the Systematic Review.</p
<p>Flowchart of 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>Flowchart illustrating the selection and inclusion process of the SNPs included in our study.</p
<p>Flowchart of identification and selection of studies for the systematic review.</p
<p>The flowchart of selecting procedure and the exclusive reasons of studies are summarized.</p
<p>Flow chart showing the selection process of articles and the number in each period.</p
<p>Flowchart shows the application of study inclusion and exclusion criteria.</p
<p>Flowchart of Articles Used to Assess Registration and Selective Reporting.</p