Funding for this research was provided by:
China Pharmaceutical University (3150120001)
Text and Data Mining valid from 2020-04-28
Received: 18 February 2020
Accepted: 15 April 2020
First Online: 28 April 2020
Ethics approval and consent to participate
: Ethical approval was waived since we used only publicly available data and materials in this study.
: Not applicable.
: The authors declare that they have no competing interests.