Funding for this research was provided by:
Dongguan social development project (2018507150241663)
Article History
Received: 26 October 2019
Accepted: 24 June 2020
First Online: 13 July 2020
Ethics approval and consent to participate
: The present study was approved by the Ethics Committee of the third People’s Hospital of Dongguan City. The research has been carried out in accordance with the World Medical Association Declaration of Helsinki. All patients provided written informed consent prior to their inclusion within the study.
: Written informed consent was obtained from all individual participants included in the study.
: The authors declare that they have no competing interests.