title: [When the patients is ill and the examination results are normal].
authors.forename: Troels Staehelin
authors.initials: TS
authors.lastname: Jensen
authors.forename: Heanning
authors.initials: H
authors.lastname: Bliddal
authors.forename: Per Klausen
authors.initials: PK
authors.lastname: Fink
mesh_terms: D002394:Catechol O-Methyltransferase / Q000235:genetics; D002908:Chronic Disease; D006801:Humans; D010146:Pain / Q000175:diagnosis* / Q000235:genetics
chemical_list: D002394:Catechol O-Methyltransferase