title: Blue-coloured skin over involved joints in psoriatic arthritis.
authors.forename: J
authors.initials: J
authors.lastname: Jajic
mesh_terms: D000293:Adolescent; D000328:Adult; D000368:Aged; D015535:Arthritis, Psoriatic / Q000175:diagnosis* / Q000453:epidemiology; D001172:Arthritis, Rheumatoid / Q000175:diagnosis* / Q000453:epidemiology; D005260:Female; D006801:Humans; D015994:Incidence; D008297:Male; D008875:Middle Aged; D010859:Pigmentation Disorders / Q000175:diagnosis* / Q000453:epidemiology; D011379:Prognosis; D012189:Retrospective Studies; D018570:Risk Assessment; D012494:Sampling Studies; D012680:Sensitivity and Specificity; D012720:Severity of Illness Index; D012880:Skin Pigmentation