title: Exclusivity versus the hierarchy, or fear and loathing of the undefined.
authors.forename: Ross E
authors.initials: RE
authors.lastname: Petty
mesh_terms: D001171:Arthritis, Juvenile / Q000145:classification*; D002648:Child; D005239:Fear; D006801:Humans; D010686:Philosophy, Medical; D012219:Rheumatology