title: UVB phototherapy: principles, radiation sources, regimens.
mesh_terms: D000222:Adaptation, Physiological; D004890:Erythema / Q000209:etiology; D006801:Humans; D010787:Photosensitivity Disorders / Q000532:radiotherapy*; D011565:Psoriasis / Q000532:radiotherapy*; D011836:Radiation Tolerance; D011853:Radiobiology; D011879:Radiotherapy Dosage; D014467:Ultraviolet Therapy / Q000009:adverse effects / Q000295:instrumentation