. 2022 Nov 17;8(6):e200. doi: 10.1192/bjo.2022.599
© The Author(s) 2022
This is an Open Access article, distributed under the terms of the Creative Commons Attribution licence (http://creativecommons.org/licenses/by/4.0/), which permits unrestricted re-use, distribution and reproduction, provided the original article is properly cited.
Fig. 1.
PRISMA flow diagram.