title: Reply to C.T. Hiley.
authors.affiliation: Johns Hopkins University, Baltimore, MD kleinla@jhmi.edu.
authors.forename: Lawrence R
authors.initials: LR
authors.lastname: Kleinberg
mesh_terms: D001932:Brain Neoplasms / Q000188:drug therapy* / Q000532:radiotherapy*; D003072:Cognition Disorders / Q000188:drug therapy*; D005260:Female; D006801:Humans; D007189:Indans / Q000627:therapeutic use*; D008297:Male; D010880:Piperidines / Q000627:therapeutic use*
chemical_list: D007189:Indans; D010880:Piperidines