Text and Data Mining valid from 2018-04-24
Received: 29 October 2017
Accepted: 22 March 2018
First Online: 24 April 2018
Ethics approval and consent to participate
: This study was approved by the ethics committee of Peking University Shenzhen Hospital. All patients provided informed consent.
: Not applicable.
: The authors declare that they have no competing interests.
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