“…The search identified 584 candidate references, of which 28 were studies deemed to be eligible (16,17,18,19,20,21,22,23,24,25,26,27,28,29,30,31,32,38,39,40,41,42,43,44,45,46,47,48). We excluded six studies (42,44,45,46,47,48) because the stereotactic radiosurgery was carried with a CyberKnife or linear accelerator. One study had few patients (nZ3) who underwent GKS (43).…”