title: HMOs have turned hospital doors into stone walls.
authors: Harvard University Medical School.
authors: R M
authors: RM
authors: Goldwyn
mesh_terms: D006279:Health Maintenance Organizations / Q000592:standards*; D006297:Health Services Accessibility / Q000191:economics*; D006760:Hospitalization / Q000191:economics*; D006801:Humans; D008297:Male; D010344:Patient Advocacy; D010351:Patient Discharge / Q000191:economics; D010819:Physician's Role; D012017:Referral and Consultation / Q000592:standards; D014481:United States