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. 2017 Mar 28;7:45308. doi: 10.1038/srep45308

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© The Author(s) 2017

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BFE and PFE denote better feed efficiency and poor feed efficiency, respectively. (a,b) Different superscripted small letters indicate significant difference at P < 0.05. (a,b) Different superscripted capital letters indicate significant differences at P < 0.01.