1. Deaths: leading causes for 2004;Heron;Natl Vital Stat Rep,2007
2. Prevalence of disabilities and associated health conditions among adults: United States, 1999;Centers for Disease Control and Prevention (CDC);MMWR Morb Mortal Wkly Rep,2001
3. Prevalence of selected chronic conditions: United States, 1990-1992;Collins;Vital Health Stat 10,1997