Brain Neoplasms/epidemiology; Adjuvants, Immunologic/therapeutic use; Adolescent; Adult; Aged; Antineoplastic Agents/therapeutic use; Astrocytoma/epidemiology; Brain Neoplasms/mortality; Brain Neoplasms/therapy; Carmustine/therapeutic use; Child; Child, Preschool; Combined Modality Therapy; England; Ependymoma/epidemiology; Female; Glioblastoma/epidemiology; Humans; Hyperthermia, Induced; Immunization, Passive; Infant; Infant, Newborn; Male; Medulloblastoma/epidemiology; Meningioma/epidemiology; Middle Aged; Oligodendroglioma/epidemiology; United States