Calls to NHS Direct.
D000293:Adolescent; D002648:Child; D002675:Child, Preschool; D015277:Hotlines / Q000458:organization & administration*; D006801:Humans; D007223:Infant; D010372:Pediatrics / Q000458:organization & administration; D011785:Quality Assurance, Health Care / Q000379:methods; D013222:State Medicine / Q000458:organization & administration*; D014218:Triage / Q000458:organization & administration*; D006113:United Kingdom