title: [Problems with respiratory disorders on farms].
authors.forename: G H
authors.initials: GH
authors.lastname: Wentink
authors.forename: A
authors.initials: A
authors.lastname: de Kruif
mesh_terms: D000818:Animals; D001912:Bovine Virus Diarrhea-Mucosal Disease / Q000175:diagnosis / Q000821:virology; D002417:Cattle; D002418:Cattle Diseases / Q000175:diagnosis* / Q000382:microbiology; D012141:Respiratory Tract Infections / Q000175:diagnosis / Q000382:microbiology / Q000662:veterinary*