Systematic review and critical appraisal of psoriasis clinical practice guidelines: a Global Guidelines in Dermatology Mapping Project (GUIDEMAP).

Most psoriasis guidelines were unable to consistently demonstrate high quality across multiple appraisal tools. The EuroGuiDerm guideline on the systemic treatment of psoriasis vulgaris was the only CPG to receive 'excellent quality' across all six AGREE II domains, to raise no Lenzer's red flags, and to have higher trustworthiness by IOM criteria.