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Article History

Received: 24 February 2017

Accepted: 15 January 2018

First Online: 22 January 2018

Ethics approval

: All experiments were approved and reviewed by the Animal Welfare and Ethics Committee of Huazhong Agricultural University, Wuhan, China following the national legislations regarding animal’s welfare. Furthermore, the owners of the slaughterhouses were inquired for getting verbal permission to conduct this study.

: Not applicable

: The authors declare that they have no competing interests.

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