title: The aftermath of efficacy.
authors.forename: Alfred O
authors.initials: AO
authors.lastname: Berg
mesh_terms: D015179:Colorectal Neoplasms / Q000517:prevention & control*; D006293:Health Promotion / Q000379:methods*; D006801:Humans; D008403:Mass Screening; D009780:Occult Blood; D011320:Primary Health Care / Q000379:methods*