[Qin, Xun-Si; Liang, Gui-Jin; Chen, Chun-Lei; Feng, Yan-Min; Shen, Wei; Li, Lan; Cheng, Shun-Feng] Qingdao Agr Univ, Coll Anim Sci & Technol, Key Lab Anim Reprod & Germplasm Enhancement Univ, Lab Germ Cell Biol, Qingdao, Peoples R China.
[Pan, Bo] Univ Guelph, Dept Anim & Poultry Sci, Guelph, ON N1G 2W1, Canada.
[Zhang, Xi-Feng] Wuhan Polytech Univ, Coll Biol & Pharmaceut Engn, Wuhan, Peoples R China.
[De Felici, Massimo] Univ Roma Tor Vergata, Dept Biomed & Prevent, Rome, Italy.