title: Problems with the definition of axial and peripheral disease patterns in psoriatic arthritis.
authors.forename: William J
authors.initials: WJ
authors.lastname: Taylor
authors.forename: Hans-Georg
authors.initials: HG
authors.lastname: Zmierczak
authors.forename: Philip S
authors.initials: PS
authors.lastname: Helliwell
mesh_terms: D015535:Arthritis, Psoriatic / Q000150:complications / Q000175:diagnosis* / Q000503:physiopathology; D003937:Diagnosis, Differential; D006801:Humans; D007596:Joints / Q000503:physiopathology; D013167:Spondylitis, Ankylosing / Q000150:complications / Q000175:diagnosis* / Q000503:physiopathology