Chen, Sinan
He, Yao
Wu, Dandong
Hu, Ning
Liang, Xi
Jiang, Dianming
Huang, Wei
Chen, Hong http://orcid.org/0000-0002-4152-624X
Article History
Received: 17 September 2019
Accepted: 31 January 2020
First Online: 14 February 2020
Compliance with ethical standards
:
: The authors declare that they have no conflict of interest.
: All procedures performed in this retrospective study were in accordance with the ethical standards of the First Affiliated Hospital of Chongqing Medical University, and this study was performed after obtaining approval from our institutional review board (IRB, No. 20194701).