title: Influenza vaccination rates, feedback and the Hawthorne effect.
authors.forename: Philip M
authors.initials: PM
authors.lastname: Polgreen
authors.forename: Jean
authors.initials: J
authors.lastname: Pottinger
authors.forename: Linnea
authors.initials: L
authors.lastname: Polgreen
authors.forename: Daniel J
authors.initials: DJ
authors.lastname: Diekema
authors.forename: Loreen A
authors.initials: LA
authors.lastname: Herwaldt
mesh_terms: D003142:Communication; D015987:Effect Modifier, Epidemiologic; D006282:Health Personnel / Q000523:psychology*; D006293:Health Promotion; D006801:Humans; D017589:Immunization Programs / Q000706:statistics & numerical data; D007252:Influenza Vaccines; D007251:Influenza, Human / Q000453:epidemiology / Q000517:prevention & control*; D007484:Iowa / Q000453:epidemiology; D014611:Vaccination / Q000523:psychology*
chemical_list: D007252:Influenza Vaccines