Funding for this research was provided by:
National Natural Science Foundation of China (81871124)
Text and Data Mining valid from 2020-03-19
Received: 23 December 2019
Accepted: 13 March 2020
First Online: 19 March 2020
Ethics approval and consent to participate
: The Ethical Committee of Tianjin Medical University General Hospital approved the protocol for this investigation and all investigations were conducted in conformity with ethical principles of research. The Ethical NO. is IRB2019-WZ-119.
: Not applicable.
: The authors declare that they have no competing interests.