Response to Letter to the editor: ‘European guidelines for topical PDT part 1. JEADV 2013;27:536–544' DOI: 10.1111/jdv.12258 - C.A. Morton; R.‐M. Szeimies; A. Sidoroff; L.R. Braathen (Journal of the European Academy of Dermatology and Venereology, 2015)