Liu, Hongling
Yang, Yang
Text and Data Mining valid from 2021-01-04
Version of Record valid from 2021-01-04
Article History
Received: 15 July 2020
Accepted: 27 November 2020
First Online: 4 January 2021
Ethics approval and consent to participate
: This research was approved by the ethics commitment of Cangzhou Central Hospital and corresponding informed consents were signed by all the participants.
: All of the authors have consented to publication of this research.
: The authors declare that they have no conflict of interest.