Article History
Received: 12 February 2018
Accepted: 11 January 2019
First Online: 23 January 2019
Ethics approval
: All procedures were approved by the Chungnam National University Animal Care and Use Committee. Twenty small breed adult dogs donated from an animal shelter after euthanasia for reasons unrelated to this present study.
: Not applicable.
: The authors declare that they have no competing interests.
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