Funding for this research was provided by:
Leading Technology of Modern Agricultural Science and Technology City (Z181100002418008)
National Scientific Supporting Projects of China (2015BAD03B06)
National Waterfowl-Industry Technology Research System (CARS-42-09)
Jiangsu Development and Reform Commission (BE2017349)
Text and Data Mining valid from 2019-01-03
Received: 27 July 2018
Accepted: 16 December 2018
First Online: 3 January 2019
Ethics approval and consent to participate
: Animal experiments were approved and performed according to the Animal Care and Use Committee of China Agricultural University (permit number: SYXK 2007–0023).
: Not Applicable.
: The authors declare that they have no competing interests.
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