Text and Data Mining valid from 2019-06-12
Received: 27 December 2018
Accepted: 4 June 2019
First Online: 12 June 2019
Ethics approval and consent to participate
: The ethics committee or review committee of the First Affiliated Hospital of Xinjiang Medical University approved the research protocol. Because the study was a retrospective cohort study based on real-world situations, there was no need to obtain informed consent from the patients.
: All authors agreed to publish this work.
: No potential conflicts of interest relevant to this article were reported by any of the authors. None of the funding sources played a role in the design, collection, analysis or interpretation of the data or the decision to submit the manuscript for publication. The authors declare that they have no competing interests.