1. Boers M (2003) Understanding the window of opportunity concept in early rheumatoid arthritis. Arthritis Rheum 48:1771–1774
2. Bruce B, Fries JF (2005) The Arthritis, Rheumatism and Aging Medical Information System (ARAMIS): still young at 30 years. Clin Exp Rheumatol 23:S163–S167
3. Buttgereit F, da Silva JA, Boers M et al. (2002) Standardised nomenclature for glucocorticoid dosages and glucocorticoid treatment regimens: current questions and tentative answers in rheumatology. Ann Rheum Dis 61:718–722
4. Fries JF, Hess EV, Klinenberg J (1974) A standard database for rheumatic diseases. Arthritis Rheum 17:336
5. Huscher D, Thiele K, Zink A für die Arbeitsgemeinschaft Regionaler Kooperativer Rheumazentren in der DGRh (2004) Patienten mit rheumatoider Arthritis und ankylosierender Spondylitis. Geschlechtsspezifische Unterschiede in der Behandlung. Arthritis Rheum 6:205–210