1. Development of a computerized index of clinical disease activity in systemic lupus erythematosus;Symmons;Q J Med,1988
2. BILAG 2004: development and initial validation of an updated version of the British Isles Lupus Assessment Group's disease activity index for patients with systemic lupus erythematosus;Isenberg;Rheumatology (Oxford),2005
3. Measurement of systemic lupus erythematosus activity in clinical research;Liang;Arthritis Rheum,1988
4. Activity criteria in systemic lupus erythematosus;Bombardieri;Clin Exp Rheumatol,1994