Funding for this research was provided by:
National Natural Science Foundation of China (No. 21571116, No.21475080, No.21575084)
Text and Data Mining valid from 2019-01-14
Received: 14 September 2018
Revised: 30 November 2018
Accepted: 6 December 2018
First Online: 14 January 2019
Compliance with ethical standards
: The study was performed in accordance with the ethical standards.
: The authors declare that they have no conflict of interest.
: The HeLa cells were donated by Tongpai Biological Cell Bank (Shanghai, China). The study is therefore exempt from institutional review board (IRB) approval.
: This research did not involve human participants or animals, and therefore, obtaining informed consent was not required.