Text and Data Mining valid from 2019-04-29
Received: 17 January 2019
Accepted: 4 April 2019
First Online: 29 April 2019
Ethics approval and consent to participate
: This study was approved by the Ethics Committee of Nanjing Chest Hospital, and written informed consent was obtained before surgery from all patients.
: Not applicable.
: The authors declare that they have no competing interests.
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