Erratum to: Transgenic Res (2012) 21:499–510 DOI 10.1007/s11248-011-9550-6

Due to an unfortunate turn of events, the term C57BL/6J rats was introduced in the original publication where it should have read C57BL/6J mice. Hence, in the above-mentioned article ‘rats’ should read ‘mice’ throughout (as shown in the title above).