1. 1. Centers for Disease Control and Prevention: Prevalence of arthritis—United States, 1997. MMWR Morb Mortal Wkly Rep 50:334-336, 2001.
2. 2. Centers for Disease Control and Prevention: Arthritis prevalence and activity limitations—United States, 1990. MMWR Morb Mortal Wkly Rep 43:433-438, 1994.
3. 3. Centers for Disease Control and Prevention: Prevalence and impact of arthritis among women in the United States, 1989-1991. MMWR Morb Mortal Wkly Rep 44:329-334, 517-518, 1995.
4. 4. Centers for Disease Control and Prevention: Prevalence and impact of arthritis by race and ethnicity—United States, 1989-1991. MMWR Morb Mortal Wkly Rep 45:373-378, 1996.
5. 5. Yelin E, Callahan LF: The economic cost and social and psychological impact of musculoskeletal conditions. Arthritis Rheum 10:1351-1362, 1995.