Funding for this research was provided by:
Beijing Jishuitan Hospital “Nova Program” (XKXX201808)
Beijing Hospital Authority Youth Program (QML20190403)
Beijing Jishuitan Hospital “Medical and Engineering Intersection Project” (YGQ-201924)
Text and Data Mining valid from 2020-03-23
Received: 17 September 2019
Accepted: 9 March 2020
First Online: 23 March 2020
Ethics approval and consent to participate
: The study was approved by the ethical committees of the Beijing Jishuitan Hospital (approval number: 201811–03) and the Shanghai Changzheng Hospital (approval number: 201812–01). The need for individual consent was waived by both committees because of the retrospective nature of the study.
: Not applicable.
: The authors declare that they have no competing interests.