Funding for this research was provided by:
National Natural Science Foundation of China (81771740)
Beijing Natural Science Foundation (7184251)
Article History
Received: 12 June 2019
Revised: 16 August 2019
Accepted: 2 October 2019
First Online: 11 November 2019
Compliance with ethical standards
:
: None.
: The manuscript must be read and approved by all of the authors.
: This study was approved by the Ethics Committee of Peking University First Hospital.