title: Understanding the results of epidemiologic studies.
mesh_terms: D001943:Breast Neoplasms / Q000453:epidemiology; D004032:Diet; D004034:Diet Surveys; D004041:Dietary Fats / Q000008:administration & dosage; D004812:Epidemiologic Methods; D005523:Food Supply; D006801:Humans; D008175:Lung Neoplasms / Q000453:epidemiology; D009369:Neoplasms / Q000453:epidemiology*; D011446:Prospective Studies; D012306:Risk; D012907:Smoking; D014801:Vitamin A / Q000008:administration & dosage
chemical_list: D004041:Dietary Fats; D014801:Vitamin A