Funding for this research was provided by:
General Program of National Natural Science Foundation of China (No.81373662)
Text and Data Mining valid from 2020-03-09
Received: 4 December 2019
Accepted: 17 February 2020
First Online: 9 March 2020
Ethics approval and consent to participate
: This article was approved by the Ethics Committee of the Third Affiliated Hospital of Beijing University of Chinese Medicine.
: The authors declare that they have no competing interests.