Funding for this research was provided by:
the Dalian Leading Talent Program Funding Project under Grant (2018C014)
Received: 1 November 2019
Accepted: 24 July 2020
First Online: 1 August 2020
Ethics approval and consent to participate
: The study protocol was approved by the ethics committee of the First Affiliated Hospital of Dalian Medical University (number PJ-KY-2017-113(X)) and registered in Chinese Clinical Trial Registry (number ChiCTR1800014633). All participants in the study signed the informed consent form and were free to quit the study at any time for any reasons.
: Not applicable.
: The authors report no conflicts of interest.