title: In response to Drs. Schild, Wong, and Nisi, IJROBP 2002;53:787.
authors.forename: Gene
authors.initials: G
authors.lastname: Kopelson
mesh_terms: D004307:Dose-Response Relationship, Radiation; D004806:Ependymoma / Q000532:radiotherapy*; D006801:Humans; D013120:Spinal Cord Neoplasms / Q000532:radiotherapy*