Zhang, Xuehan
Jiao, Yang http://orcid.org/0000-0003-3957-3829
Article History
Received: 9 March 2019
Revised: 19 July 2019
Accepted: 15 August 2019
First Online: 22 August 2019
Compliance with ethical standards
:
: None.
: This study protocol has been approved by the Ethics Committee of Peking Union Medical College Hospital (protocol number: S-K 702). The ethics committee waived the requirement for informed consent because anonymous data were analyzed retrospectively.