Funding for this research was provided by:
Guangdong Science and Technology Project (Grants No.2016A020215191)
Text and Data Mining valid from 2020-05-01
Received: 11 December 2019
Accepted: 20 April 2020
First Online: 1 May 2020
Ethics approval and consent to participate
: This research was approved by the Ethics Committee of the Guangdong Second Provincial General Hospital, and written informed consent was collected from all participants.
: Informed consent was obtained from all patients.
: The authors declare that they have no competing interests.