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Article History

Received: 5 June 2018

Accepted: 6 November 2018

First Online: 4 December 2018

Ethics approval and consent to participate

: This study was approved by the ethics committee of The Second Affiliated Hospital of Hainan Medical University. All the patients involved in this study were introduced with the collection and usage of the tissues when they were conscious and had the capacity of independent decision-making. Written consent was obtained directly from each participant that was approved by the ethics committee of The Second Affiliated Hospital of Hainan Medical University.

: Written informed consent for publication was received from all the patients.

: The authors declare that they have no competing interests.

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