title: Evolution.
authors.affiliation: Parkland Health System; University of Texas Southwestern Medical Center, Dallas, Texas; and University of Nebraska Medical Center, Omaha, NE john.cox@utsouthwestern.edu.
authors.forename: John V
authors.initials: JV
authors.lastname: Cox
authors.affiliation: Parkland Health System; University of Texas Southwestern Medical Center, Dallas, Texas; and University of Nebraska Medical Center, Omaha, NE.
authors.forename: James O
authors.initials: JO
authors.lastname: Armitage
mesh_terms: D006801:Humans; D008495:Medical Oncology; D010506:Periodicals as Topic