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Authors
An, Ning
Cheng, Donghui
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Article History
Received: 25 July 2018
Accepted: 9 October 2018
First Online: 7 November 2018
Compliance with Ethical Standards
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: This study was authorized by the Sichuan People’s Hospital, and obtained written informed consents from all the participants.
: The authors confirm that there are no conflicts of interest.
