title: Delineating the age ranges used to define adolescents and young adults.
authors.forename: Ann M
authors.initials: AM
authors.lastname: Geiger
authors.forename: Sharon M
authors.initials: SM
authors.lastname: Castellino
mesh_terms: D000293:Adolescent; D000295:Adolescent Medicine / Q000592:standards*; D000328:Adult; D000367:Age Factors; D003695:Delivery of Health Care; D006801:Humans; D008495:Medical Oncology / Q000592:standards*; D009369:Neoplasms / Q000453:epidemiology* / Q000628:therapy; D018426:SEER Program; D055815:Young Adult