Funding for this research was provided by:
Beijing Municipal Administration of Hospitals Clinical Medicine Development of Special Funding Support (No. ZYLX201818)
Text and Data Mining valid from 2019-08-14
Received: 20 February 2019
Accepted: 16 July 2019
First Online: 14 August 2019
Ethics approval and consent to participate
: This prospective observational study was approved by the local ethics committee (Capital Medical University Institutional Review Board, China, January 23, 2015; IRB #0810-758). Written informed consent was obtained from all patients participating in the trial. The trial was registered with ExternalRef removed (NCT02356133; date of registration, February 1, 2015). Our methodology followed the international guidelines for observational studies.
: Not applicable.
: The authors declare that they have no competing interests.