Li, Kui http://orcid.org/0000-0002-5684-3918
Yang, Caiyong http://orcid.org/0000-0002-7049-2472
Jiang, Zicheng
Liu, Shengxi
Liu, Jun
Fan, Chuanqi
Li, Tao
Dong, Xuemin
Article History
Received: 14 March 2019
Accepted: 23 July 2019
First Online: 29 July 2019
Ethics approval and consent to participate
: This study was approved by the Ethics Committee of the Ankang Central Hospital (ECACH-2016011). The patient’s informed written consent to analysis of their medical records was waived due to the retrospective nature of this study. No further permission from the hospital was required.
: Not applicable
: The authors declare that they have no competing interests.