. Author manuscript; available in PMC: 2021 Nov 28.
Published in final edited form as: Lancet Public Health. 2021 Sep;6(9):e648–e660. doi: 10.1016/S2468-2667(21)00140-7
This is an Open Access article under the CC BY-NC-ND 4.0 license.
Figure 1:
Study selection