Funding for this research was provided by:
National Natural Science Foundation of China (81772413)
the Innovation Foundation of the Central South University for Postgraduate (2018zzts045)
the Scientific Research Project of Science and Technology Office of Hunan Province (2017TP1005)
the Key Research and Development Program of Hunan Province (2018SK2070, 2018SK2071)
the Xiangya Clinical Big Data System Construction Project of Central South University (45)
the Clinical Scientific Research Foundation of Xiangya Hospital, Central South University (2015L03)
Text and Data Mining valid from 2020-02-12
Received: 21 April 2019
Accepted: 7 February 2020
First Online: 12 February 2020
Ethics approval and consent to participate
: This study was approved by the Ethics Committee of Xiangya Hospital, Central South University (reference numbers: 201312459), and written informed consent was obtained from all study participants.
: Not applicable.
: The authors declare that they have no competing interest.