title: Group practices and PPOs: meeting the quality challenge.
authors.forename: N
authors.initials: N
authors.lastname: Koch
authors.forename: E
authors.initials: E
authors.lastname: Weisman
mesh_terms: D002985:Clinical Protocols; D006123:Group Practice / Q000592:standards*; D006301:Health Services Needs and Demand; D008329:Managed Care Programs / Q000592:standards*; D010818:Practice Patterns, Physicians'; D011243:Preferred Provider Organizations / Q000592:standards*; D011785:Quality Assurance, Health Care; D014481:United States