Langton, A K Lysyl oxidase activity in human skin is increased by chronic ultraviolet radiation exposure and smoking. [electronic resource] - The British journal of dermatology 05 2017 - 1376-1378 p. digital Publication Type: Letter; Multicenter Study ISSN: 1365-2133 Standard No.: 10.1111/bjd.14959 doi Subjects--Topical Terms: AdultAgedButtocksChronic DiseaseExtracellular Matrix--enzymologyForearmHumansOxidation-ReductionProtein-Lysine 6-Oxidase--metabolismRadiation Exposure--adverse effectsRadiation ProtectionSkin--enzymologySkin Aging--physiologySmoking--metabolismUltraviolet Rays--adverse effects