1. Diagnosis and management of psoriasis and psoriatic arthritis in adults: a national clinical guideline Publication: Edinburgh, Scotland : Scottish Intercollegiate Guidelines Network (SIGN), October 2010 Subject(s): Arthritis, Psoriatic -- therapyPsoriasis -- therapyArthritis, Psoriatic -- diagnosisDisease ManagementPsoriasis -- diagnosisAcitretin -- therapeutic useScotland