Funding for this research was provided by:
The Science and Technology Foundation of Shenzhen (JCYJ20170307095620828)
Text and Data Mining valid from 2020-02-28
Received: 21 December 2019
Accepted: 24 February 2020
First Online: 28 February 2020
Ethics approval and consent to participate
: The study was approved by the local Ethics Committee of Second Clinical Medical College of Jinan University. All subjects provided written informed consent before they participated in this study.
: Not applicable.
: The authors declare that they have no competing interests.