1. Patient Treatment Report Biometrics Division Veterans Administration: Personal Communication with William Page Chief Biometrics Division Washington DC October 1983
2. Patient Administration Division Department of the Army Office of the Surgeon General: Personal communication with Lloyd A Schlaeppi Colonel MSC Chief Patient Administration Division Washington D.C. November 1983
3. Biometrics Division Directoret of Health Care Support Office of Surgeon General Department of the Air Force: Personal communication with Charles C. Cadenhead Lieutenant Colonel USAFMAC Chief Biometrics Division Boiling AFB Washington D C November 22 1983
4. Naval Medical Services Center Health Care Operations Naval Medical Command Department of the Navy: Statistics on Endarterectomies Personal communication with J.J. Quinn Commodore Deputy Commander for Health Care Operations and A. Lewis Washington D.C. December 1983
5. National Center for Health Statistics. Eighth Revision International Classification of Diseases Adapted for Use in the United States Vol. I and 2 PHS Pub. No. 1693. Public Health Service. Washington. U.S. Government Printing Office 1967 and 1968 (ICDA) Code 26.1