Funding for this research was provided by:
National Natural Science Foundation of China (81672441)
Natural Science Foundation of Guangdong Province (2016A030313580, 2017A030313607)
Text and Data Mining valid from 2020-03-26
Received: 11 December 2019
Accepted: 17 March 2020
First Online: 26 March 2020
Ethics approval and consent to participate
: This study was reviewed and approved by the medical ethics committee of Nanfang Hospital, Southern Medical University, China. Written informed consents were obtained from all patients before operation.
: Informed consent was obtained from all individual participants included in the study.
: The authors declare no conflict of interest.