Description
Inclusion Criteria:
- * Patients with known rheumatic diseases including systemic lupus erythematosus, rheumatoid arthritis, connective tissue disease, undifferentiated connective tissue disease
Exclusion Criteria:
- * Poor venous access, unstable medical problems or significant cardiopulmonary disease, anemia, leukopenia, thrombocytopenia, anticoagulation therapy, recent significant changes in medication or pregnacy. Patient cannot be taking large dose of corticosteroids (above 30mg per day) or cytotoxic drugs (cyclophosphamide, azathiprine, cyclosporine, methotrexate).
Ages Eligible for Study:
18 Years to 100 Years (ADULT, OLDER_ADULT)
Sexes Eligible for Study: ALL
Accepts Healthy Volunteers:
No