Haseeb Sajjad.
The Koebner Response : An attempt to induce it with UVB radiation.
Biomedica Jan ;12(2):61-3.

A study was carried out to determine the minimum dose of UVB which could produce a Koebner response in patients with psoriasis. Eight patients with psoriasis were selected, there were five males and three females, with ages ranging from 22-65 years. Each patient was irradiated with UVB on three different square areas on his/her back. The dose of UVB used for the first square in each patient was twice the MED (Minimal Erythema Dose), for the second square three times the MED and four times the MED for the third square. None of the patients developed the Koebner response.

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