Funding for this research was provided by:
Biotechnology and Biological Sciences Research Council (BB/J004243/1, BB/M011925/1, BBS/E/D/20211550, BBS/E/D/20211552, BB/J006815/1)
Medical Research Council (MR/K001744/1)
Natural Environment Research Council (GB) (R8/H10/56)
Text and Data Mining valid from 2018-08-07
Received: 23 November 2017
Accepted: 31 July 2018
First Online: 7 August 2018
: All animals in this study were bred at the National Avian Research Facility at the Roslin Institute. Approval was obtained from the Protocols and Ethics Committee of the Roslin Institute and the Protocols and Ethics Committee of the University of Edinburgh. All animal work was carried out under the regulations of the Animals (Scientific Procedures) Act 1986 under Home Office project license PPL 60/4420.
: Not applicable.
: The authors declare that they have no competing interests.
: Springer Nature remains neutral with regard to jurisdictional claims in published maps and institutional affiliations.