Comment on

• Use of the emergency ambulance service to an inner city accident and emergency department--a comparison of general practitioner and '999' calls.

  Pennycook AG, Makower RM, Morrison WG. Pennycook AG, et al. J R Soc Med. 1991 Dec;84(12):726-7. doi: 10.1177/014107689108401211. J R Soc Med. 1991. PMID: 1774748 Free PMC article.