Ren, Yixuan
Liu, Juan
Wang, Ling
Luo, Yongjun
Ding, Xiaofang
Shi, Aiqi
Liu, Jiangyan
Funding for this research was provided by:
Doctoral Research Foundation of the Lanzhou University Second Hospital (ynbskyjj2015-1-31)
Article History
First Online: 9 April 2020
Compliance with ethical standards
:
: The authors declare no conflict of interest.
: This retrospective study was approved by our institutional review board. Informed written consent was waived given the retrospective nature of the work.