<p>Search strategy and flow chart of screened, excluded, and eventually analyzed articles.</p
<p>Flow chart summarizing the process of literature search and study selection.</p
<p>Presentation of the procedure of literature searching and study selection with numbers of article...
<p>Search strategy: A diagrammatic representation of the retrieval strategy used for identifying and...
<p>Flowchart of search strategy and selection of studies for inclusion in review.</p
<p>A flow chart showing the details of search strategy and the trials selection process according to...
<p>Flow chart illustrating the search process and the reasons for excluding studies.</p
<p>Flow diagram chart showing the literature search strategy with the number of retrieved abstracts,...
<p>Note that final numbers refer to total number of data series included in analyses, whereas other ...
<p>Summary of search strategy and selection process based on included and excluded studies.</p
<p>Summary of the search strategy and selection process based on included and excluded studies.</p
Flow diagram of search strategy used for systematic review and meta-analysis.</p
<p>Flow diagram of search strategy and study selection for the meta-analysis.</p
Flow chart of the literature search and the study selection process for the meta-analysis.</p
<p>Flow chart of the identified articles, the screening and inclusion process.</p
<p>Flow chart showing the selection process of articles and the number in each period.</p
<p>Flow chart summarizing the process of literature search and study selection.</p
<p>Presentation of the procedure of literature searching and study selection with numbers of article...
<p>Search strategy: A diagrammatic representation of the retrieval strategy used for identifying and...
<p>Flowchart of search strategy and selection of studies for inclusion in review.</p
<p>A flow chart showing the details of search strategy and the trials selection process according to...
<p>Flow chart illustrating the search process and the reasons for excluding studies.</p
<p>Flow diagram chart showing the literature search strategy with the number of retrieved abstracts,...
<p>Note that final numbers refer to total number of data series included in analyses, whereas other ...
<p>Summary of search strategy and selection process based on included and excluded studies.</p
<p>Summary of the search strategy and selection process based on included and excluded studies.</p
Flow diagram of search strategy used for systematic review and meta-analysis.</p
<p>Flow diagram of search strategy and study selection for the meta-analysis.</p
Flow chart of the literature search and the study selection process for the meta-analysis.</p
<p>Flow chart of the identified articles, the screening and inclusion process.</p
<p>Flow chart showing the selection process of articles and the number in each period.</p
<p>Flow chart summarizing the process of literature search and study selection.</p
<p>Presentation of the procedure of literature searching and study selection with numbers of article...
<p>Search strategy: A diagrammatic representation of the retrieval strategy used for identifying and...
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