[He, Xi; Xu, Ling; Zhang, Haihan] Hunan Agr Univ, Dept Anim Sci, Changsha 410128, Hunan, Peoples R China.
[Zhu, Mo; Li, Dongfeng; Liu, Yang; Zhang, Haihan] Nanjing Agr Univ, Dept Anim Genet Breeding & Reprod, Coll Anim Sci & Technol, Natl Expt Teaching Demonstrat Ctr Anim Sci, Nanjing 210095, Jiangsu, Peoples R China.
[Zhang, Haihan] Indiana Univ Sch Med, Med Sci, Bloomington, IN 47408 USA.
[Liu, Lingbin] Southwest Univ, Coll Anim Sci & Technol, Chongqing 400715, Peoples R China.