title: By the numbers. Largest managed-care organizations. Ranked by commercial HMO enrollment in 2003.
authors.forename: Susanna
authors.initials: S
authors.lastname: Moon
mesh_terms: D019985:Benchmarking; D006279:Health Maintenance Organizations / Q000145:classification / Q000706:statistics & numerical data*; D020407:Internet; D014481:United States