1. Thyberg I, Skogh T, Hass UA, Gerdle B (2005) Recent-onset rheumatoid arthritis: a 1-year observational study of correlations between health-related quality of life and clinical/laboratory data. J Rehabil Med 37:159–165
2. Eberhardt K, Larsson BM, Nived K, Lindqvist E (2007) Work disability in rheumatoid arthritis—development over 15 years and evaluation of predictive factors over time. J Rheumatol 34:481–487
3. Björk MA, Thyberg IS, Skogh T, Gerdle BU (2007) Hand function and activity limitation according to health assessment questionnaire in patients with rheumatoid arthritis and healthy referents: 5-year followup of predictors of activity limitation (The Swedish TIRA Project). J Rheumatol 34:296–302
4. Sokka T, Toloza S, Cutolo M et al (2009) Women, men, and rheumatoid arthritis: analyses of disease activity, disease characteristics, and treatments in the QUEST-RA study. Arthritis Res Ther 11:R7
5. Björk M, Thyberg I, Rikner K, Balogh I, Gerdle B (2009) Sick leave before and after diagnosis of rheumatoid arthritis: a report from the Swedish TIRA project. J Rheumatol 36:1170–1179