Patterns of ambulatory care in internal medicine: The National Ambulatory Medical Care Survey.
D000328:Adult; D000367:Age Factors; D000368:Aged; D000553:Ambulatory Care; D005260:Female; D006306:Health Surveys; D006801:Humans; D007388:Internal Medicine; D008297:Male; D008511:Medicine; D008875:Middle Aged; D010361:Patients; D010820:Physicians; D012737:Sex Factors; D013038:Specialization; D014481:United States