Funding for this research was provided by:
Agro-scientific Research in the Public Interest ((20140304-07))
National Broiler Industry Technology Project (No. 31072049)
Received: 6 June 2017
Accepted: 17 December 2017
First Online: 25 January 2018
Ethics approval and consent to participate
: All animal experiments were reviewed and approved by the Institutional Animal Care and Use Committee of China Agricultural University and performed in accordance with the Guidelines for Experimental Animals of the Ministry of Science and Technology (Beijing, China).
: Not applicable.
: All authors approved the submission of this manuscript and declare no conflicts of interest. The manuscript has not been previously published and is not under consideration for publication elsewhere. The agencies that funded this research had no role in the study design, analysis, or writing of this article.