Etterlin, Pernille Engelsen; Morrison, David A.; Österberg, Julia; Ytrehus, Bjørnar; Heldmer, Eva; Ekman, Stina. Osteochondrosis, but not lameness, is more frequent among free-range pigs than confined herd-mates. Acta Veterinaria Scandinavica (AVS) 2015 ;Volum 57.(63) s. - NINA
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