Oertel, Michael ; Scobioala, Sergiu ; Kroeger, Kai ; Baehr, Andrea; Stegger, Lars ; Haverkamp, Uwe ; Haverkamp, U. ; Schäfers, Michael ; Eich, Hans-Theodor ; Eich, Hans Theodor ; Eich, Hans Theodor ; Eich, Hans Theodor: Worth a local treatment? – Analysis of modern radiotherapy concepts for oligometastatic prostate cancer