. 2021 Dec 2;15(4):727–737. doi: 10.1093/ckj/sfab243
© The Author(s) 2021. Published by Oxford University Press on behalf of the ERA.
This is an Open Access article distributed under the terms of the Creative Commons Attribution License (https://creativecommons.org/licenses/by/4.0/), which permits unrestricted reuse, distribution, and reproduction in any medium, provided the original work is properly cited.
FIGURE 1:
PRISMA flow diagram illustrating the study selection process.