Funding for this research was provided by:
Fundamental Research Funds for the Central Universities (3332019135)
Capital Health Development Fund (201614035)
CAMS Major Collaborative Innovation Project (2016-I2M-1-011)
Text and Data Mining valid from 2019-11-11
Received: 30 June 2019
Accepted: 1 November 2019
First Online: 11 November 2019
Ethics approval and consent to participate
: Informed consent was obtained from all participants included in the study. The study protocol complied with the Declaration of Helsinki and was approved by hospital’s ethical review board (FuWai Hospital & National Center for Cardiovascular Diseases, Beijing, China).
: Not applicable.
: The authors declare that they have no competing interests.