Funding for this research was provided by:
Capital Health Research and Development of Special (201614035)
CAMS Major Collaborative Innovation Project (2016-I2M-1-011)
Received: 28 May 2018
Accepted: 12 November 2018
First Online: 23 November 2018
Ethics approval and consent to participants
: 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.
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