Erythema elevatum diutinum associated with severe oropharyngeal ulceration and pyoderma gangrenosum. (11th May 2018) - Hügel, Rainer; Brasch, Jochen; Yordanova, Ivelina; Schröder, Johann Oltmann; Fazel, Asita; Gläser, Regine; Schwarz, Thomas; Christophers, Enno