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HIGHLIGHTS FOR JUNE

In 84 volunteers (Fitzpatrick skin type I–V), the relation between pre-exposure skin pigmentation and the MMD/MED ratio was investigated after a single narrowband UVB and Solar simulator (Solar) exposure. In fair-skinned persons, the UV-dose to give pigmentation (minimal melanogenesis dose, MMD) after a single UVBexposure is larger than the UV-dose to elicit erythema (minimal erythema dose, MED) (MEDoMMD). The ratio of MMD/MED is highly dependent on skin pigmentation. In very brown pigmented persons, the MMD/MED ratio is 1 (MED = MMD) after a single exposure to Solar or nUVB.