Funding for this research was provided by:
National Natural Science Foundation of China (30900650, 81372501, 81572260, 81172232, and 31430030)
Natural Science Foundation of Guangdong Province (2011B031800025, S2012010008378, S2012010008270, S2013010015327, 2013B021800126, 20090171120070, 9451008901002146, 2014A030313052, 2014J4100132, 2015A020214010, 2016A020215055, 20180506 and 2013B021800259)
Science and Technology Foundation of Shenzhen (JCYJ20170412155231633, 20180225112449943 and JCYJ20180305164128430)
Text and Data Mining valid from 2020-01-24
Received: 3 November 2019
Accepted: 16 January 2020
First Online: 24 January 2020
Ethics approval and consent to participate
: Not applicable.
: All authors read and approved the final manuscript.
: All authors declare that they have no competing interests.