Carri Westgarth*, Gina L Pinchbeck, John WS Bradshaw, Susan Dawson, Rosalind M Gaskell and Robert M Christley
* Corresponding author: Carri Westgarth carri.westgarth@liverpool.ac.uk
BMC Veterinary Research 2007, 3:5 doi:10.1186/1746-6148-3-5