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Article History

Received: 26 May 2018

Accepted: 22 April 2019

First Online: 3 May 2019

Ethics approval and consent to participate

: The principles of the Declaration of Helsinki were followed and this study was approved by the ethics committee of the Affiliated Hospital, Anhui University of Chinese Traditional Medicine (approval number: 201311001). Written informed consents were obtained from all participants.

: Not applicable.

: The authors declare that they have no competing interests.

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