Kriz, Jan; Eich, Hans-Theodor; Eich, Hans Theodor; Eich, Hans Theodor; Eich, Hans Theodor; Bruns, Frank; Heyd, Reinhard; Heyd, R.; Schäfer, Ulrich; Haverkamp, Uwe; Haverkamp, U.; Büntzel, Jens; Seegenschmiedt, Michael H.; Seegenschmiedt, Michael Heinrich; Seegenschmiedt, Michael-Heinrich; Seegenschmiedt, M. Heinrich; Seegenschmiedt, M. H.; Micke, Oliver: Radiotherapy in langerhans cell histiocytosis - a rare indication in a rare disease