The purpose of this study is to identify genetic (inherited) and other factors that contribute to rheumatoid arthritis (RA) and to better understand the way RA patients respond to treatment. Participation in this study involves completing forms and giving blood. Blood will be used to isolate, store, and analyze DNA, as well as to collect serum.
This study will also use the results of blood tests and questionnaires to help establish a large national database of patients with rheumatoid arthritis.