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Article History

Received: 25 January 2018

Accepted: 4 April 2018

First Online: 8 May 2018

Ethics approval and consent to participate

: The study protocol was approved by Tongji Hospital of Tongji Medical College of Huazhong University of Science and Technology institutional review board. Because the serum samples of KD and control groups used in the research were the reutilization of clinical test specimens and did not involved the issue of patient privacy exposure, so we were allowed for exemption from patient informed consent.

: The authors declare that they have no competing interests.

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