Funding for this research was provided by:
Beijing Municipal Science & Technology Commission (D181100000218003)
CAMS Innovation Fund for Medical Sciences (2018-I2M-1-002)
Chinese Academy of Medical Sciences (2019PT320013)
Received: 31 December 2019
Accepted: 8 June 2020
First Online: 22 June 2020
Ethics approval and consent to participate
: All participants signed thier informed consent according to the Declaration of Helsinki prior to data collection. This study was reviewed and approved by the Ethics Committee of Beijing Hospital, China. (ID number: 2018BJYYEC-121-02), the version date of the protocol approved by ethics is September 18, 2018, and the version number is 1.0.
: Not applicable.
: The authors declare that they have no competing interests.