. 2019 Jul 17;15(1-2):e1018. doi: 10.1002/cl2.1018
© 2019 The Authors Campbell Systematic Reviews published by John Wiley & Sons Ltd on behalf of The Campbell Collaboration
This is an open access article under the terms of the http://creativecommons.org/licenses/by/4.0/ License, which permits use, distribution and reproduction in any medium, provided the original work is properly cited.
Figure 2.
Search and selection flowchart