Systematic Reviews
Copyright ©2014 Baishideng Publishing Group Inc.
World J Clin Cases. Oct 16, 2014; 2(10): 552-564
Published online Oct 16, 2014. doi: 10.12998/wjcc.v2.i10.552
Figure 2
Figure 2 Distribution of included and excluded articles: Distribution of the 37 evaluated (green) and 159 excluded (red) studies of the search results ordered by their date of publication. Shaded fractions represent the 4 articles which were not available as full text version.