title: HMO picture unclear. New managed-care studies present contradictory data.
authors.forename: E
authors.initials: E
authors.lastname: Weissenstein
mesh_terms: D019538:Health Care Surveys; D006279:Health Maintenance Organizations / Q000592:standards*; D006801:Humans; D006278:Medicare; D017060:Patient Satisfaction; D019984:Quality Indicators, Health Care; D014481:United States