<qa>  What is the name of the photodermatology Unit of the Department of Dermatology?PLE patients will be recruited through the Photodermatology Unit of the Department of Dermatology, Medical University of Graz, Austria. Eligible patients will be identified through diagnosis-related computer-assisted search in the electronic patient chart system of the Unit. The diagnosis of PLE will be verified by patients history, clinical symptoms, histologic findings, laboratory studies andor phototesting procedures. 