title: Commentary: Epidemiology? Keep it broad and deep.
authors.affiliation: London School of Hygiene and Tropical Medicine, Keppel Street, London WC1E 7HT, UK.
authors.forename: K
authors.initials: K
authors.lastname: McPherson
mesh_terms: D015340:Epidemiologic Research Design; D006801:Humans; D012961:Sociology; D009626:Terminology as Topic