To Cursor on UVA, it comes that it is laced with a longer wavelength than UVB. Pouring light on UVA, it brings up that it is used in commercial tanning salons. UVA proves to be unproductive until the patients got also treated with a photosensitizing medication like Psoralen. The blend of psoralen and UVA light is widely popular as PUVA (Psoralen and UVA light). It is noticed that the physicians now go for using UVB since it is proved to be the effectual phototherapy and above all it does not require psoralen.
http://www.vitiligoguide.com/the-difference-between-uva-and-uvb/
http://www.vitiligoguide.com/the-difference-between-uva-and-uvb/
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