Funding for this research was provided by:
Beijing JishuitanHospital (ZR-201921)
Received: 9 January 2020
Accepted: 31 March 2020
First Online: 22 April 2020
Ethics approval and consent to participate
: The study design was approved by the Ethics Committee of Beijing Jishuitan Hospital (No. 201911–15). Given the retrospective nature of the study, the Ethics Committee determined that an informed consent was not required.
: Not applicable.
: The authors declare no competing interests.