title: Hidden pain or hidden evidence?
authors.forename: Alice Isabel
authors.initials: AI
authors.lastname: Jordan
authors.forename: Claud
authors.initials: C
authors.lastname: Regnard
authors.forename: Julian C
authors.initials: JC
authors.lastname: Hughes
mesh_terms: D003147:Communication Disorders / Q000523:psychology; D006801:Humans; D010146:Pain / Q000523:psychology*; D010147:Pain Measurement; D015203:Reproducibility of Results