title: [Rare conditions are rare].
authors.affiliation: Institutt for allmenn- og samfunnsmedisin, Universitetet i Oslo, Postboks 1130, Blindern 0318 Oslo, Norway. mette.brekke@medisin.uio.no
authors.forename: Mette
authors.initials: M
authors.lastname: Brekke
mesh_terms: D057210:Delayed Diagnosis; D003937:Diagnosis, Differential; D006801:Humans; D010178:Pancoast Syndrome / Q000175:diagnosis* / Q000628:therapy; D035583:Rare Diseases / Q000175:diagnosis