Funding for this research was provided by:
National Natural Science Foundation of China (8187121167)
Natural Science Foundation of Anhui Province (1908085QH339)
Text and Data Mining valid from 2019-11-15
Received: 30 July 2019
Accepted: 30 September 2019
First Online: 15 November 2019
Ethics approval and consent to participate
: This study was approved by the Ethical Committee of Anhui Medical University.
: Not applicable.
: The authors declare that they have no competing interests.