[Yuan, Daixiu] Jishou Univ, Dept Med, Jishou 416000, Peoples R China.
[Tan, Bie; Wang, Jing; Xiao, Dingfu] Hunan Agr Univ, Dept Anim Sci, Changsha 410000, Peoples R China.
[Tan, Bie; Wang, Jing; Yin, YL; Li, Jiefeng; Yin, Yulong] Chinese Acad Sci, Inst Subtrop Agr, Lab Anim Nutr Physiol & Metab Proc,Key Lab Agroec, Natl Engn Lab Pollut Control & Waste Utilizat Liv, Changsha 410125, Peoples R China.
[Liu, Yanhong] Univ Calif Davis, Dept Anim Sci, Davis, CA 95616 USA.