1. Patterns of academic achievement among hearing impaired students: 1974 and 1983;Allen,1986
2. American Heart Association. Know the facts, get the stats. Available at: http://www.americanheart.org/downloadable/heart/1073975605723Know%20Facts%20Get%20Stats.pdf. Accessed December 13, 2004.
3. American Stroke Association. Acute and preventive treatments. Available at: http://www.strokeassociation.org/presenter.jhtml?identifier=2532. Accessed December 13, 2004.
4. Time to hospital presentation in patients with acute stroke;Barsan;Arch. Intern. Med.,1993
5. Declining prevalence of no known major risk factors for heart disease and stroke among adults—United States, 1991–2001;CDC;MMWR,2004