title: Is a fourth year necessary in radiation oncology training? Different models and funding mechanisms.
authors.affiliation: University of California, San Francisco.
authors.forename: D A
authors.initials: DA
authors.lastname: Larson
authors.forename: T L
authors.initials: TL
authors.lastname: Phillips
mesh_terms: D005257:Fellowships and Scholarships; D006801:Humans; D007396:Internship and Residency; D008495:Medical Oncology / Q000193:education*; D011871:Radiology / Q000193:education*; D011878:Radiotherapy; D012106:Research; D014481:United States