Safety and efficacy of Cyberknife radiosurgery for visceral and lymph node metastases of renal cell carcinoma – a retrospective, single center analysis oleh S. Rodler, M. Schott, A. Tamalunas, J. Marcon, A. Graser, J. Casuscelli, C. Stief, C. Fürweger, A. Muacevic, M. Staehler