1. Prevalence of primary and secondary fibrositis;Wolfe F;J Rheumatol,1983
2. The prevalence of chronic widespread pain in the general population;Croft P;J Rheumatol,1993
3. Fibrositis (fibromyalgia) in rheumatoid arthritis;Wolfe F;J Rheumatol,1984
4. The Overlap Between Fibromyalgia and Inflammatory Rheumatic Disease
5. The prevalence of fibromyalgia in other chronic pain conditions;Yunus MB;Pain Res Treat,2012