Ulrika Windahl*, Elin Reimegård, Bodil S Holst, Agneta Egenvall, Liselotte Fernström, Mona Fredriksson, Gunilla Trowald-Wigh and Ulrika G Andersson
* Corresponding author: Ulrika Windahl ulrika.windahl@sva.se
BMC Veterinary Research 2012, 8:34 doi:10.1186/1746-6148-8-34