Indirect exposure to cats at school and worsening of asthma in children.
D000818:Animals; D001249:Asthma / Q000209:etiology*; D002415:Cats; D002648:Child; D004781:Environmental Exposure / Q000009:adverse effects*; D006801:Humans; D006967:Hypersensitivity / Q000150:complications*; D012574:Schools