title: Reply to M.C. Chamberlain.
authors.affiliation: Cadence Brain Tumor Center, Northwestern Medicine Chicago Proton Center, Warrenville, IL vgondi@chicagocancer.org.
authors.forename: Vinai
authors.initials: V
authors.lastname: Gondi
authors.affiliation: Montefiore Medical Center and Albert Einstein College of Medicine of Yeshiva University, Bronx, NY.
authors.forename: Wolfgang A
authors.initials: WA
authors.lastname: Tome
authors.affiliation: University of Maryland School of Medicine, Baltimore, MD.
authors.forename: Minesh P
authors.initials: MP
authors.lastname: Mehta
mesh_terms: D001932:Brain Neoplasms / Q000532:radiotherapy* / Q000556:secondary*; D016371:Cranial Irradiation / Q000379:methods*; D005260:Female; D006624:Hippocampus / Q000528:radiation effects*; D006801:Humans; D008297:Male; D008569:Memory Disorders / Q000517:prevention & control*; D011939:Mental Recall / Q000528:radiation effects*; D058953:Neural Stem Cells / Q000528:radiation effects*; D011832:Radiation Injuries / Q000517:prevention & control*; D050397:Radiotherapy, Intensity-Modulated