Letter: Primary physicians and internist-pediatricians.
D000488:Allied Health Personnel / Q000193:education; D002568:Certification; D003479:Curriculum; D003695:Delivery of Health Care; D004503:Education, Medical, Graduate; D004504:Education, Medical, Undergraduate; D005194:Family Practice / Q000193:education*; D006748:Hospital Departments; D006784:Hospitals, Teaching; D007388:Internal Medicine / Q000193:education*; D007396:Internship and Residency; D010372:Pediatrics / Q000193:education*; D010820:Physicians / Q000600:supply & distribution; D012017:Referral and Consultation; D013038:Specialization; D014481:United States