The presence of leukaemia (lymphosarcoma) and feline leukaemia virus (FeLv) in cats in The Netherlands.
D000818:Animals; D002371:Cat Diseases / Q000382:microbiology*; D002415:Cats / Q000382:microbiology*; D005260:Female; D007938:Leukemia / Q000382:microbiology / Q000662:veterinary*; D005256:Leukemia Virus, Feline; D008297:Male; D009426:Netherlands