title: Immortal person-time in studies of cancer outcomes.
authors: Timothy L
authors: TL
authors: Lash
authors: Stephen R
authors: SR
authors: Cole
mesh_terms: D003627:Data Interpretation, Statistical; D006801:Humans; D009369:Neoplasms / Q000401:mortality* / Q000628:therapy; D011446:Prospective Studies; D012107:Research Design; D012189:Retrospective Studies; D016019:Survival Analysis; D015996:Survival Rate; D013997:Time Factors; D016896:Treatment Outcome