title: Letter: Horizontal transmission of leukaemia.
mesh_terms: D000208:Acute Disease; D000293:Adolescent; D000328:Adult; D000367:Age Factors; D000818:Animals; D001955:British Columbia; D002415:Cats; D002648:Child; D004196:Disease Outbreaks / Q000453:epidemiology*; D004197:Disease Reservoirs; D005260:Female; D006801:Humans; D007938:Leukemia / Q000453:epidemiology* / Q000209:etiology; D008297:Male; D011157:Population Dynamics; D013997:Time Factors