Funding for this research was provided by:
National Natural Science Foundation of China (No. 81770491)
Ministry of Education Innovation Team Development Program of China (No. IRT16R57)
Young Talent Recruiting Plans of Xi’an Jiaotong University
Text and Data Mining valid from 2019-03-07
Received: 3 May 2018
Accepted: 20 February 2019
First Online: 7 March 2019
Ethics approval and consent to participate
: This study was approved by the Ethics Committee of the First Affiliated Hospital of Xi’an Jiaotong University (XJTU1AF2015LSL-057). The patient’s informed written consent to analysis of their medical records was waived due to the retrospective nature of this study. And no further permission from the hospital was required.
: Not applicable.
: The authors declare that they have no competing interests.
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