Received: 21 July 2019
Accepted: 1 November 2019
First Online: 14 November 2019
Ethics approval and consent to participate
: The ethics committee of Wuhan University School of Medicine (WUSM) reviewed it, and verified it to comply with the Declaration of Helsinki and its revised version, as well as the relevant regulations of biomedical journals, and approved the research (No.2018YF0080). All participants were provided with information about the investigation and gave written informed consent to participate.
: Not applicable.
: The authors declare that they have no competing interests.