title: Primary care in the United States: primary care gatekeeping and referrals: effective filter or failed experiment?
authors.affiliation: Health Services Research and Development Center, Department of Health Policy and Management, Bloomberg School of Public Health, Johns Hopkins University, Baltimore, MD 21205, USA. cforrest@jhsph.edu
authors.forename: Christopher B
authors.initials: CB
authors.lastname: Forrest
mesh_terms: D020793:Gatekeeping / Q000458:organization & administration*; D015276:Health Care Rationing; D006295:Health Resources / Q000706:statistics & numerical data; D006801:Humans; D011320:Primary Health Care / Q000458:organization & administration*; D012017:Referral and Consultation / Q000458:organization & administration* / Q000706:statistics & numerical data; D006113:United Kingdom; D014481:United States