Text and Data Mining valid from 2018-06-22
Received: 28 June 2017
Accepted: 5 June 2018
First Online: 22 June 2018
Ethics approval and consent to participate
: The study receive government and hospital permission and obtain written informed consent from all participants. The Research Ethics Committee of the RenJi Hospital affiliated to Shanghai Jiao Tong University School of Medicine approved our secondary analysis of anonymised data.
: The authors declare that they have no competing interests.
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