Funding for this research was provided by:
Natural Science Foundation of Guangdong Province (2015A03030817)
National Natural Science Foundation of China (61976239)
Innovation Foundation of High-end Scientific Research Institutions of Zhongshan City of China (2019AG031)
Received: 29 December 2018
Accepted: 24 February 2020
First Online: 18 March 2020
Ethics approval and consent to participate
: The datasets used in the experiment are publicly available on the website https://trace.ncbi.nlm.nih.gov/Traces/sra/ and http://smash.cs.berkeley.edu/datasets.html, so the ethics approval is not required.
: Not applicable.
: The authors declare that they have no competing interests.