Irradiance, as well as body site and timing of readings, is important in determining ultraviolet A minimal erythemal dose

Abstract

Irradiance, as well as body site and timing of readings, is important in determining ultraviolet A minimal erythemal dose. (Response to Gambichler et al. July BJD)

Gambichler et al. demonstrated that, in their population, using a 25 mWcm⁻² ultraviolet A-1 (UVA-1) source the median 24-hour delayed minimal erythema dose (MED) on the inner forearm was > 130 Jcm⁻².¹ This differs from the 20 Jcm⁻² to 28 Jcm⁻² median MED reported from our centre.²

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