Polymorphic light eruption occurs in 18% of Europeans and does not show higher prevalence with increasing latitude: multicenter survey of 6,895 individuals residing from the Mediterranean to Scandinavia - Rhodes, Lesley; Bock, Michael; Soe Janssens, A.; Ling, Tsui C.; Anastasopoulou, Lina; Antoniou, Christina; Aubin, François; Bruckner, Thomas; Faivre, Brigitte; Gibbs, Neil K.; Jansen, Christer; Pavel, Stan; et al. (The journal of investigative dermatology, 2010)