title: Casting light on evidence.
abstract: Clinicians are growing inured to the fact that rarely do the results of a single randomized controlled trial (RCT) decisively change clinical practice. Nor should they. In a new RCT, Kirke and colleagues have compared the therapeutic effects of different types of UVB radiation on clearance of psoriasis. Their study is unlikely to be the last word on this topic.
authors.affiliation: Department of Dermatology, University of Edinburgh, Edinburgh, United Kingdom. jonathan.rees@ed.ac.uk
authors.forename: Jonathan L
authors.initials: JL
authors.lastname: Rees
mesh_terms: D003627:Data Interpretation, Statistical; D019317:Evidence-Based Medicine; D006801:Humans; D009381:Neoplasms, Radiation-Induced / Q000209:etiology; D018579:Patient Selection; D010789:Phototherapy / Q000009:adverse effects / Q000379:methods*; D011565:Psoriasis / Q000532:radiotherapy* / Q000628:therapy*; D016032:Randomized Controlled Trials as Topic; D015203:Reproducibility of Results; D012878:Skin Neoplasms / Q000209:etiology; D014466:Ultraviolet Rays; D014467:Ultraviolet Therapy / Q000009:adverse effects / Q000379:methods*