Funding for this research was provided by:
Beijing Council of Science and Technology (D09050703650901)
Received: 29 May 2018
Accepted: 21 September 2018
First Online: 27 September 2018
Ethics approval and consent to participate
: This study was approved by the Ethics Committee of Fuwai Hospital, National Center for Cardiovascular Diseases, Chinese Academy of Medical Sciences and Peking Union Medical College. Written informed consents were obtained from all the participants of BJNCDRS.
: Not applicable
: The authors declare that they have no competing interests.
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