title: Can Observational Data Replace Randomized Trials?
authors.affiliation: University of Oxford, Oxford, United Kingdom.
authors.forename: Paul
authors.initials: P
authors.lastname: McGale
authors.affiliation: University of Oxford, Oxford, United Kingdom.
authors.forename: David
authors.initials: D
authors.lastname: Cutter
authors.affiliation: University of Oxford, Oxford, United Kingdom.
authors.forename: Sarah C
authors.initials: SC
authors.lastname: Darby
authors.affiliation: University of Oxford, Oxford, United Kingdom.
authors.forename: Katherine E
authors.initials: KE
authors.lastname: Henson
authors.affiliation: University of Michigan, Ann Arbor, MI.
authors.forename: Reshma
authors.initials: R
authors.lastname: Jagsi
authors.affiliation: University of Oxford, Oxford, United Kingdom carolyn.taylor@ndph.ox.ac.uk.
authors.forename: Carolyn W
authors.initials: CW
authors.lastname: Taylor
mesh_terms: D001943:Breast Neoplasms / Q000175:diagnosis / Q000401:mortality / Q000532:radiotherapy*; D002423:Cause of Death; D015897:Comorbidity; D019317:Evidence-Based Medicine / Q000379:methods*; D005260:Female; D006801:Humans; D016032:Randomized Controlled Trials as Topic; D012042:Registries; D012307:Risk Factors; D013997:Time Factors; D016896:Treatment Outcome; D014481:United States / Q000453:epidemiology