Liu, Qian http://orcid.org/0000-0002-1874-9525
Qin, Mingzhao
Zhou, Jian
Zheng, Hui
Liu, Weiping
Shen, Qi
Article History
Received: 4 November 2020
Accepted: 27 May 2021
First Online: 21 June 2021
Declarations
:
: This study protocol was reviewed and approved by Beijing Tongren Hospital Ethical Board (TRECKY2020-033). Because all data were provided by the database retrospectively, informed consent of the participants was not required.
: Not applicable.
: The authors declare having no competing interests.