. 2018 May 28;2(4):175–184. doi: 10.1002/bjs5.61
© 2018 The Authors. BJS Open published by John Wiley & Sons Ltd on behalf of BJS Society Ltd
This is an open access article under the terms of the http://creativecommons.org/licenses/by-nc-nd/4.0/ License, which permits use and distribution in any medium, provided the original work is properly cited, the use is non‐commercial and no modifications or adaptations are made.
Figure 1.
PRISMA diagram showing selection of articles for review