1. Stamm TA, Aletaha D, Pfugbeil S, Kapral T, Montag K, Machold KP, Smolen JS (2007) The use of databases for quality assessment in rheumatoid arthritis. Clin Exp Rheumatol 25(6 suppl. 47):82–85
2. Sokka T, Haugeberg G, Pincus T (2007) Assessment of quality of rheumatoid arthritis care requires joint count and/or patient questionnaire data not found in a usual medical record: examples from studies of premature mortality, changes in clinical status between 1985 and 2000 and a QUEST-RA global perspective. Clin Exp Rheumatol 25(6 suppl. 47):86–97
3. Kidd B, Mapp P, Blake D (2000) Rheumatoid Arthritis: clinical picture. In: Firestein GS, Panayi GS, Wolleim FA (eds) Rheumatoid arthritis: new frontiers in pathogenesis and treatment. Oxford University Press, New York
4. Silman AJ, Pearson J (2002) Epidemiology and genetics of rheumatoid arthritis. Arthritis Res 4(suppl.3):S265–S268
5. Alarcon GS (1995) Epidemiology of rheumatoid arthritis. Rheum Dis Clin North Am 21:589–604