Authors:
Lina Olofsson 1Swedish university of agricultural sciences, Department of animal environment and health, Gråbrödragatan 19, 532 31 Skara, Sweden

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Steffen W Hansen 2Aarhus university, Department of animal health, welfare and nutrition, Blichers alle 20, 8830 Tjele, Denmark; lina.olofsson@slu.se

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Lena Lidfors 1Swedish university of agricultural sciences, Department of animal environment and health, Gråbrödragatan 19, 532 31 Skara, Sweden

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