"d7a071a777d517375a9eff5d145cfe54f58fd269" . . "62" . "51" . "1995-11"^^ . . "10.1016/0167-5877(95)00498-x" . "Risk factors associated with seropositivity to porcine respiratory coronavirus in Danish swine herds" . . . . . . . . "62" . _:b662882787 . . _:b662882787 "2023-12-20T18:53:15.405666"^^ . . . . . . "10.1016/0167-5877(95)00498-x" . _:b662882787 . . . . "25" . . . . . . "25" . . . _:b662882787 . _:b662882787 . . "10.1016/0167-5877(95)00498-x" . . "Elsevier BV" . . . "51" . . . . . . _:b662882787 . . . . .