Funding for this research was provided by:
Key project of hubei provincial health commission (WJ2017Z024)
Hubei provincial health commission medical college special (WJ2018H175)
Received: 30 March 2020
Accepted: 4 May 2020
First Online: 14 May 2020
Ethics approval and consent to participate
: This study was approved by the institutional ethics board of Yangtze University. Informed consent of the study was waived because of the retrospective nature and the analysis used anonymous clinical data.
: The analysis used anonymous clinical data.