Funding for this research was provided by:
Capital Health Development Fund (201614035)
CAMS Major Collaborative Innovation Project (2016-I2M-1-011)
Text and Data Mining valid from 2018-11-06
Received: 7 April 2018
Accepted: 24 October 2018
First Online: 6 November 2018
Ethics approval and consent to participate
: Our study complied with the Declaration of Helsinki and was approved by the hospital’s ethical review board (Fu Wai Hospital & National Center for Cardiovascular Diseases, Beijing, China). Informed written consents were obtained from all the participants.
: Not applicable
: The authors declare that they have no competing interests.
: Springer Nature remains neutral with regard to jurisdictional claims in published maps and institutional affiliations.