. 2022 May 5:1–13. doi: 10.1159/000524202
Copyright © 2022 by S. Karger AG, Basel
This article is made available via the PMC Open Access Subset for unrestricted re-use and analyses in any form or by any means with acknowledgement of the original source. These permissions are granted for the duration of the COVID-19 pandemic or until permissions are revoked in writing. Upon expiration of these permissions, PMC is granted a perpetual license to make this article available via PMC and Europe PMC, consistent with existing copyright protections.
Fig. 1.
PRISMA flow diagram for study selection.