title: When will enough ever be enough?
authors.forename: Bibb
authors.initials: B
authors.lastname: Allen
mesh_terms: D002986:Clinical Trials as Topic; D015897:Comorbidity; D055088:Early Detection of Cancer / Q000706:statistics & numerical data* / Q000639:trends*; D019317:Evidence-Based Medicine; D006291:Health Policy / Q000639:trends*; D006801:Humans; D008175:Lung Neoplasms / Q000175:diagnosis / Q000401:mortality* / Q000517:prevention & control*; D015995:Prevalence; D012907:Smoking / Q000401:mortality*; D014481:United States / Q000453:epidemiology