Funding for this research was provided by:
Fundamental Research Funds for the Central Universities (2018-F05)
Capital Health Development Fund (201614035)
CAMS Innovation Fund for Medical Sciences (2016-I2M-1-011)
Youth Research Fund of Peking Union Medical College (2018-XHQN03)
Text and Data Mining valid from 2020-02-10
Received: 16 December 2019
Accepted: 22 January 2020
First Online: 10 February 2020
Ethics approval and consent to participate
: Approvals of the local ethics committees were obtained at all sites and the informed written consents were obtained from enrolled patients. This study complied with the Declaration of Helsinki and was approved by the hospital ethical review board (FuWai Hospital and National Center for Cardiovascular Diseases, Beijing, China).
: Not applicable.
: The authors declare that they have no competing interests.