The changing interface of primary and specialty care.
Lanier
D C
DC
Center for Primary Care Research, Agency for Health Care Policy and Research, Rockville, Maryland 20852, USA.
Clancy
C M
CM
D003695:Delivery of Health Care; D006302:Health Services Research; D006801:Humans; D008329:Managed Care Programs; D008511:Medicine / Q000458:organization & administration*; D011320:Primary Health Care / Q000458:organization & administration*; D012017:Referral and Consultation / Q000458:organization & administration*; D013038:Specialization; D014481:United States