Media type: E-Article Title: Cross-sectional study on risk factors for Porcine Reproductive and Respiratory Syndrome virus sow herd instability in German breeding herds Contributor: Nathues, Christina; Janssen, Eltje; Duengelhoef, Andrea; Nathues, Heiko; grosse Beilage, Elisabeth imprint: Springer Science and Business Media LLC, 2018 Published in: Acta Veterinaria Scandinavica Language: English DOI: 10.1186/s13028-018-0411-7 ISSN: 1751-0147 Keywords: General Veterinary ; General Medicine Origination: Footnote: Access State: Open Access