Funding for this research was provided by:
National Natural Science Foundation of China (81471766 and 81873917)
Text and Data Mining valid from 2019-10-22
Received: 15 June 2019
Accepted: 1 October 2019
First Online: 22 October 2019
Ethics approval and consent to participate
: This retrospective study was approved by the institutional review board of the Union Hospital, Tongji Medical college, Huazhong University of Science and Technology. Written informed consent was obtained from all patients prior to treatment.
: Not applicable.
: The authors declare that they have no competing interests.