title: In regard to Salter et al., IJROBP 2001;51:555-562.
authors: R J
authors: RJ
authors: Bale
authors: R A
authors: RA
authors: Sweeney
mesh_terms: D001932:Brain Neoplasms / Q000601:surgery; D003627:Data Interpretation, Statistical; D006801:Humans; D007103:Immobilization; D016634:Radiosurgery / Q000295:instrumentation*