title: Physicians as gatekeepers. A complex challenge.
authors.affiliation: University of California-Riverside 92521.
authors.forename: M D
authors.initials: MD
authors.lastname: Reagan
mesh_terms: D003363:Cost Control; D004992:Ethics, Medical; D006279:Health Maintenance Organizations / Q000191:economics; D006291:Health Policy / Q000639:trends; D008484:Medicaid / Q000191:economics; D006278:Medicare / Q000191:economics; D010344:Patient Advocacy; D012017:Referral and Consultation / Q000191:economics*; D014481:United States