Florian M Trefz*, Annette Lorch, Melanie Feist, Carola Sauter-Louis and Ingrid Lorenz
* Corresponding author: Florian M Trefz florian.trefz@campus.lmu.de
BMC Veterinary Research 2012, 8:238 doi:10.1186/1746-6148-8-238
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