Ma, Feng
Yang, Xiaoxia
Zhou, Meilan
Bai, Ming
Zhao, Lijuan
Li, Li
Dong, Ruijuan
Liu, Chunmei
Li, Rong
Sun, Shiren
Funding for this research was provided by:
Natural Science Foundation of China (81670655)
Key research and development plan of Shaanxi province, China (2017ZDXM-SF-045)
The discipline boosting program of the Xijing Hospital of the Fourth Military Medical University (XJZT18Z15)
Article History
Received: 5 March 2020
Accepted: 11 May 2020
First Online: 23 May 2020
Compliance with ethical standards
:
: No conflicts of interest need to be declared.
: The study was approved by the Ethics Committee of Xijing Hospital. This study waived the requirement for written informed consent due to the retrospective nature of this study. This study protocol was performed in accordance with the 1964 Declaration of Helsinki as well as the amendments or comparable ethical standards.