Funding for this research was provided by:
Guizhou Science and Technology Department (QKHLH2016-7158)
Department of Health of Guizhou Province (gzwjkj2018-1-015)
Article History
Received: 2 July 2020
Accepted: 13 January 2021
First Online: 29 January 2021
Ethics approval and consent to participate
: The study complied with the Declaration of Helsinki and was approved by Guizhou Provincial People’s Hospital’s institutional committee (ID:2018068). As the data were obtained retrospectively from patient charts, informed consent was deemed unnecessary following the above guidelines.
: Not applicable.
: The authors declare that they have no competing interests.