. 2021 Nov 25;13(1):121–133. doi: 10.1002/jrsm.1537
© 2021 The Authors. Research Synthesis Methods published by John Wiley & Sons Ltd.
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.
Relevant records per volume screened (n = 8,449)