Text and Data Mining valid from 2018-07-19
Received: 3 November 2017
Accepted: 4 July 2018
First Online: 19 July 2018
Ethics approval and consent to participate
: This study was approved by the ethics committee of Jinhua hospital of Zhejiang University. Written consent to participate was provided by participants included in the study.
: not applicable.
: The authors declare that they have no competing interests.
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