Changing dimensions of medical practice arrangements.
D000554:Ambulatory Care Facilities; D005260:Female; D006279:Health Maintenance Organizations; D006801:Humans; D008297:Male; D008511:Medicine; D011216:Practice Management, Medical / Q000639:trends*; D011243:Preferred Provider Organizations; D011364:Professional Practice; D011365:Professional Practice Location; D012959:Socioeconomic Factors; D013038:Specialization; D013223:Statistics as Topic; D011795:Surveys and Questionnaires; D014481:United States