Received: 8 August 2019
Accepted: 24 April 2020
First Online: 23 June 2020
Ethics approval and consent to participate
: The study protocol has been approved by the Institutional Review Board of the Guang’anmen Hospital in China (approval no. 2018-137-KY-01) (see Additional file InternalRef removed). All investigators will comply with the principles of the Declaration of Helsinki. All study participants will be voluntarily enrolled after screening, and written informed consent will be obtained prior to enrollment. All study participants will have a discussion with the researchers about the procedure, treatment, and possible risks and benefits of the trial. Moreover, all participants will have the right to opt out of the study at any time after enrollment.
: Not applicable.
: The authors declare that they have no competing interests.