Text and Data Mining valid from 2018-07-25
Received: 18 April 2018
Accepted: 3 July 2018
First Online: 25 July 2018
Ethics approval and consent to participate
: This study was approved by the Affiliated Suzhou Hospital of Nanjing Medical University Ethics Committee. No written/verbal consent was needed for this study because cadavers were used.
: Not applicable.
: The authors declare that they have no competing interests.
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