CHAPTER 3 Diagnostic phototesting in polymorphous light eruption: the optimal number of irradiations Ines J Schornagel, Edward F Knol, Huib van Weelden, Kees L.H Guikers, Carla A.F.M. Bruijnzeel-Koomen, Vigfús Sigurdsson Department of Dermatology / Allergology, University Medical Center Utrecht, Utrecht, The Netherlands Published as letter in Br J Dermatol 2005, 153: 1234-6 Diagnostic phototesting in polymorphous light eruption: the optimal number of irradiations Ines Schornagel, Edward Knol, Huib van Weelden, Kees Guikers, Carla Bruijnzeel-Koomen and Vigfús Sigurdsson Department of Dermatology and Allergology, University Medical Center Utrecht, The Netherlands Published as letter in Br J Dermatol 2005; 153: 1234-1236 ��