History and Importance of Phototherapy in Dermatology

Practicing dermatologists today are using phototherapy to treat psoriasis, vitiligo, atopic dermatitis, and many other common and uncommon dermatoses. Treatments like narrowband UV-B (NB-UV-B), psoralen plus UV-A (PUVA), UV-A-1, and excimer laser are now in the armamentarium of today's dermatologist. But when did the use of phototherapy in treating skin disease actually begin?

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