"6761940" . "Schwartz, W.L." . "PMC7172716" . . "Vet Clin North Am Large Anim Pract" . "PMC" . "2017-07-20"^^ . . . "6761940" . "10.1016/s0196-9846(17)30103-9" . "no-cc" . . "Laboratory Diagnosis of Swine Diseases" . . . . .