Text and Data Mining valid from 2018-09-05
Received: 1 February 2018
Accepted: 24 August 2018
First Online: 5 September 2018
Ethics approval and consent to participate
: This study was approved by The Ethics Committee of The General Hospital of the Peoples Liberation Army (PLA). Written informed consent to participate in the study was obtained from each participant.
: Not applicable.
: The authors declare that they have no competing interests.
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