. 2023 Oct 30;52(Suppl 4):iv44–iv66. doi: 10.1093/ageing/afad139
© World Health Organization, 2023. All rights reserved. The World Health Organization has granted the Publisher permission for the reproduction of this article.
This is an Open Access article distributed under the terms of the Creative Commons Attribution 3.0 IGO License (https://creativecommons.org/licenses/by/3.0/igo/), which permits unrestricted reuse, distribution, and reproduction in any medium, provided the original work is properly cited.
Figure 1.
PRISMA flow-chart of the systematic review.