1. Statistical abstract of the United States 1993, The National Data Book, U.S. Bureau of Census, Washington D.C., 144,088 Table 128, 113th Edition, 1993.
2. Adams JH, Duchen L. Greenfield’s Neuropathology. 5th ed. New York: Oxford University Press; 1992:155,193, 195, 218.
3. Cotran RS, Kumar V, Robbins SL. Pathologic Basis of Disease, 5th ed. Philadelphia: W.B. Saunders, 1994, p. 474.
4. Kricheff II. Arteriosclerotic ischemic cerebrovascular disease. Radiology 1987; 162: 101 - 109.
5. Wilkens E, ed. Emergency Medicine: Scientfic Foundations and Current Practice. 3rd ed. Baltimore: Williams & Wilkins; 1989: 367, 368.