title: Celebrating our 20th anniversary.
authors.affiliation: amfen@med.umich.edu.
authors.forename: A Mark
authors.initials: AM
authors.lastname: Fendrick
authors.forename: Michael E
authors.initials: ME
authors.lastname: Chernew
mesh_terms: D000846:Anniversaries and Special Events; D005544:Forecasting; D006801:Humans; D008329:Managed Care Programs; D010506:Periodicals as Topic / Q000592:standards* / Q000639:trends; D011786:Quality Control; D014481:United States