Christopher B Forrest, Azeem Majeed, Jonathan P Weiner, Kevin Carroll, Andrew B Bindman
Forrest C B, Majeed A, Weiner J P, Carroll K, Bindman A B.
Comparison of specialty referral rates in the United Kingdom and the United States: retrospective cohort analysis
BMJ 2002; 325 :370
doi:10.1136/bmj.325.7360.370