Funding for this research was provided by:
National Natural Science Foundation of China (81472243, 81670598)
Shanghai Health Bureau Key Joint Efforts Foundation (2013ZYJB001)
Text and Data Mining valid from 2019-03-08
Received: 27 September 2017
Accepted: 27 February 2019
First Online: 8 March 2019
Ethics approval and consent to participate
: This study was approved by the local ethics committee of Renji Hospital, School of Medicine, Shanghai Jiao Tong University. The requirement for informed consent was waived given the retrospective nature of the data, that was applied by the ethics committee of Renji Hospital, School of Medicine, Shanghai Jiao Tong University.
: Not applicable.
: The authors declare that they have no competing interests.
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