Inclusion Criteria	Exclusion Criteria
English language reports and human studies Ultraviolet phototherapy interventions for plaque-type psoriasis Reports involving efficacy and/or safety outcome studies Original reports with defined study methodology Reports including standardized measurements on outcome events such as technical success, safety, effectiveness, durability, quality of life or patient satisfaction	Non-systematic reviews, letters, comments and editorials Randomized trials involving side-to-side or half body comparisons Randomized trials not involving ultraviolet phototherapy intervention for plaque-type psoriasis Trials involving dosing studies, pilot feasibility studies or lacking control groups