Funding for this research was provided by:
the Cardiovascular Sunlight Research Fund of the Chinese Medical Association. (SCRFCMDA201214)
Received: 22 March 2020
Accepted: 5 June 2020
First Online: 12 June 2020
Ethics approval and consent to participate
: All participants provided written consent before entering the study according to the regulations of Beijing Anzhen hospital. The study was approved by the Ethics Committee of Beijing Anzhen Hospital, with the ethical approval number: EAN2016CLYJ0106.
: Not applicable.
: The authors declare that the research was conducted in the absence of any commercial or financial relationships that could be construed as a potential conflict of interest.