title: [Monitoring animal welfare: voluntary is 100 times better than mandatory].
authors.forename: Berrie Klein
authors.initials: BK
authors.lastname: Swormink
mesh_terms: D000820:Animal Diseases / Q000453:epidemiology*; D000827:Animal Welfare; D000818:Animals; D006801:Humans; D009426:Netherlands; D011159:Population Surveillance; D018571:Sentinel Surveillance / Q000662:veterinary*; D015047:Zoonoses / Q000453:epidemiology