Funding for this research was provided by:
National Basic Research Program of China (973 Program) (2017YFC1308300)
Scientific Research Fund of Foshan, Guangdong, China (No: 2016AB003353)
Clinical Research Startup Program of Shunde Hospital, Southern Medical University (CRSP2019001)
Text and Data Mining valid from 2019-06-03
Received: 2 April 2018
Accepted: 15 April 2019
First Online: 3 June 2019
Ethics approval and consent to participate
: All analyses were based on previous published studies, thus no ethical approval and patient consent are required.
: Not applicable.
: The authors declare that they have no competing interests.
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