Funding for this research was provided by:
Natural Science Foundation of Anhui Province (KJ2018A0198)
National Natural Science Foundation of China (81272259)
Text and Data Mining valid from 2019-11-11
Received: 21 June 2019
Accepted: 22 October 2019
First Online: 11 November 2019
Ethics approval and consent to participate
: The study ethic approval was granted from the local ethical committee of Anhui Medical University, and was performed in accordance with the principles of the Declaration of Helsinki. Written informed consent was obtained from all patients, including the patient who died during the study.
: Not applicable.
: The authors declare that they have no competing interests.