Okti Poetri, Annemarie Bouma*, Ivo Claassen, Guus Koch, Retno Soejoedono, Arjan Stegeman and Michiel van Boven
* Corresponding author: Annemarie Bouma a.bouma@uu.nl
Veterinary Research 2011, 42:74 doi:10.1186/1297-9716-42-74
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