Received: 14 October 2017
Accepted: 21 December 2017
First Online: 23 January 2018
Ethics approval and consent to participate
: The study was approved by the ethics committee of China-Japan union hospital of Jilin university, and the committee’s reference number was 2,017,040,604.
: I have obtained consent to publish from the participant to report individual patient data.
: The authors declare that they have no competing interests.
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