title: Increased mortality on a free-range layer site.
authors.forename: Olaf
authors.initials: O
authors.lastname: Swarbrick
mesh_terms: D000822:Animal Husbandry; D000818:Animals; D002645:Chickens; D004739:England / Q000453:epidemiology; D011201:Poultry Diseases / Q000401:mortality* / Q000517:prevention & control*