title: Effect of repeated annual reminder letters on influenza immunization among elderly patients.
authors.affiliation: Department of Family Medicine, McMaster University, Hamilton, Ontario, Canada.
authors.forename: B G
authors.initials: BG
authors.lastname: Hutchison
authors.forename: H S
authors.initials: HS
authors.lastname: Shannon
mesh_terms: D000368:Aged; D006801:Humans; D007252:Influenza Vaccines; D007251:Influenza, Human / Q000517:prevention & control*; D009864:Ontario; D010342:Patient Acceptance of Health Care / Q000706:statistics & numerical data*; D010349:Patient Compliance; D011177:Postal Service; D013997:Time Factors; D014611:Vaccination / Q000706:statistics & numerical data*
chemical_list: D007252:Influenza Vaccines