Funding for this research was provided by:
National Natural Science Foundation of China (31671145)
Received: 17 May 2020
Accepted: 26 June 2020
First Online: 29 July 2020
Ethics approval and consent to participate
: The study was approved by the Ethics Committee of Beijing Huilongguan Hospital, on December 18, 2019 (Ref: 2018-36-revision1), and was carried out in accordance with the Declaration of Helsinki (version 2004). Consent form was obtained from each participate (see attached file InternalRef removed). The reader can obtain the informed consent in the attached file, after agreement of the corresponding author. Participants will be asked if they agree to the use of their data when they choose to withdraw from the trial. Participants will also be asked for permission for the research team to share relevant data with people from the Universities or from regulatory authorities, where relevant.
: Not applicable.
: All authors assert that they have no competing interests.