Funding for this research was provided by:
the China Agricultural Research System Poultry-Related Science and Technology Innovation Team of Peking
Text and Data Mining valid from 2018-06-12
First Online: 12 June 2018
Compliance with Ethical Standards
: The authors declare that they have no conflict of interest.
: All applicable institutional guidelines for the care and use of animals adhered to the Animal Care and Use Committee of China Agricultural University (permit number: 20121209–1).This article does not contain any studies with human participants performed by any of the authors.
: Informed consent is not applicable in this study.