1. Estimates of the prevalence of arthritis and selected musculoskeletal disorders in the United States;Lawrence;Arthritis Rheum,1998
2. Chronic back pain;Long,1999
3. The economic impact and functional impact of rheumatic disease in the US;Yellin,1998
4. Pain and disability: clinical, behavioral, and public policy perspectives;Institute of Medicine Committee on Pain, Disability and Chronic Illness Behavior,1987
5. Prevalence of disabilities and associated health conditions among adults—United States, 1999;CDC;MMWR,2001