title: Jeopardizing validity by mismeasurement of quality of life.
authors.forename: Jeff
authors.initials: J
authors.lastname: Richardson
authors.forename: Neil A
authors.initials: NA
authors.lastname: Day
mesh_terms: D015535:Arthritis, Psoriatic / Q000175:diagnosis*; D005260:Female; D006801:Humans; D008297:Male; D010808:Physical Examination / Q000379:methods*