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