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Article History

Received: 2 January 2019

Accepted: 1 April 2019

First Online: 8 April 2019

Ethics approval and consent to participate

: The present study was approved by the ethics committee of Fujian Medical University, China, and adhered to the tenets of the Declaration of Helsinki. Additionally, written informed consent was obtained from the relatives of the patients.

: Not applicable.

: The authors declare that they have no competing interests.

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