['rheumatoid arthritis']
['mbs2320', 'placebo']

        Inclusion Criteria:

          -  Male or female patients of childbearing or non-childbearing potential with with active
             RA, receiving stable once-weekly methotrexate

          -  between 18 and 75 years of age, inclusive.

        Exclusion Criteria:

          -  Patients who are currently pregnant or breastfeeding.

          -  Patients who are being treated with biological or non-biological disease-modifying
             anti-rheumatic drug therapy.

          -  Patients with a history of any other inflammatory or arthritic disease in addition to
             RA that may interfere with the study.
      