. 2021 Jun 24;14(7):e007741. doi: 10.1161/CIRCOUTCOMES.121.007741
© 2021 American Heart Association, Inc.
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.