Article History
Received: 28 July 2017
Accepted: 7 February 2018
First Online: 13 February 2018
Ethics approval
: This study was carried out in strict accordance with the recommendations in the Guide for the Care and Use of Laboratory Animals of the National Institutes of Health. The protocol was approved by the Committee on the Ethics of Animal Experiments of the Jinzhou Medical University.
: Not applicable.
: The author declares that she has no competing interest.
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