The original article contained two incorrect citations. The correct citations with references are shown here.
The Introduction, right hand column on the second page should read as follows;
In a meta-analysis of eight publications, Aizimu et al. (Reference Aizimu, Hodge, Edwards, Dewhurst and Cheng2013) reported a significant asymptotic (negative) relationship between nitrogen use efficiency and MUN in groups of NZ Jersey (J) and Holstein-Friesian (HF) cows.
The Results and discussion, left hand column on the fifth page should read as follows;
However, Aizimu et al. (Reference Aizimu, Hodge, Edwards, Dewhurst and Cheng2013) reported a negative asymptotic relationship between MUN and protein-use efficiency in a meta-analysis.
The authors apologise for the error.