概述
The overall objective of the guideline is to provide up-to-date, evidence-based recommendations for the use of narrowband ultraviolet B (NB-UVB) phototherapy in adults, young people and children. The document aims to offer an appraisal of all relevant literature up to 18 February 2021, focusing on any key developments;address important, practical clinical questions relating to the primary guideline objective;provide guideline recommendations and, if appropriate, research recommendations.