. 2020 May 13:10.1097/DCR.0000000000001726. doi: 10.1097/DCR.0000000000001726
© The ASCRS 2020
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.
TABLE 1.
Protection levels applied in China
