Qi, Zhao
Shi, Shuiqin
Tu, Jian
Li, Shaowen
Article History
Received: 25 May 2019
Accepted: 15 July 2019
First Online: 31 July 2019
Compliance with ethical standards
:
: The authors declare that they have no conflicts of interest.
: This study was performed in accordance with the Chinese Laboratory Animal Administration Act of 1988. Before the experiments, the research protocol was reviewed and approved by the Research Ethics Committee of Anhui Agricultural University. Permission was obtained from all managers of the chicken farms studied before the samples were collected.