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[Beauchemin, K. A.; Yang, W. Z.; He, Z. X.] Agr & Agri Food Canada, Lethbridge Res Ctr, Lethbridge, AB T1J 4B1, Canada.
[Yang, L. Y.] Hunan Agr Univ, Coll Anim Sci & Technol, Changsha 410128, Hunan, Peoples R China.
[Huang, J. Y.] Chinese Acad Sci, Grad Univ, Beijing 100049, Peoples R China.
[Odongo, N. E.] IAEA, Joint FAO IAEA Div Nucl Techn Food & Agr, Anim Prod & Hlth Sect, A-1400 Vienna, Austria.