Funding for this research was provided by:
Sun Yat-sen University (16ykjc25, 2016005)
Article History
Received: 4 February 2020
Accepted: 14 June 2020
First Online: 24 June 2020
Compliance with ethical standards
:
: The authors declare that they have no conflict of interest.
: Approval was obtained from the ethics committee of the sixth affiliated hospital of Sun Yat-sen University.
: Informed consent was obtained in accordance with the standards set forth by hospital regulations.
: All the authors agreed to publish this journal.