Funding for this research was provided by:
Sanming Project of Medicine in Shenzhen (10,000,000 Chinese Yuan (2015-2020))
Received: 24 June 2019
Accepted: 20 February 2020
First Online: 6 March 2020
Ethics approval and consent to participate
: Ethical approval was obtained from the Ethics Committee of Beijing Youan Hospital, Capital Medical University. All participants signed an informed consent.
: Not applicable.
: The authors declare that they have no conflict of interest.