Wang, Baogang http://orcid.org/0000-0002-3264-5765
Tan, Yuying http://orcid.org/0000-0002-5387-3433
Yang, Xiaolin http://orcid.org/0000-0002-5492-7931
Man, Xiaxia http://orcid.org/0000-0001-9947-4529
Article History
Received: 25 September 2020
Accepted: 20 November 2020
First Online: 2 January 2021
Compliance with ethical standards
:
: The authors declare that they have no competing interests.
: The manuscript does not contain new clinical studies or new patient data. And no ethical approval was necessary due to its exclusive use of secondary data.
: Not applicable.