title: Hypersensitivity pneumonitis in a five-year-old boy: an unusual antigen source.
authors.affiliation: Department of Pediatrics, University Children's Hospital, University of Berne, Berne, Switzerland.
authors.forename: C Casaulta
authors.initials: CC
authors.lastname: Aebischer
authors.forename: U
authors.initials: U
authors.lastname: Frey
authors.forename: M H
authors.initials: MH
authors.lastname: Schöni
mesh_terms: D000542:Alveolitis, Extrinsic Allergic / Q000175:diagnosis / Q000209:etiology*; D001232:Aspergillus fumigatus; D002675:Child, Preschool; D004781:Environmental Exposure / Q000009:adverse effects; D006801:Humans; D008297:Male