The Search for Preventive Strategies for Rheumatoid Arthritis
The EULAR has proposed 6 distinct phases (A-F) of RA, characterized by the presence of genetic risk factors (phase A), environmental factors (phase B), systemic autoimmunity associated with RA (phase C), arthralgias without clinical arthritis (phase D), unclassified arthritis (phase E), and established RA (phase F).