Funding for this research was provided by:
National Natural Science Foundation of China (81871740)
Received: 6 July 2019
Accepted: 10 October 2019
First Online: 27 November 2019
Ethics approval and consent to participate
: The Regional Ethics Committee for Medical Research approved the study protocol. Informed consent was obtained from all the individual participants included in the study.
: Consent for publication was obtained from all the patients.
: The authors declare that they have no competing interests.