 6. If the patient is taking an immunosuppressive medication agent other than prednisone maintenance agent then the maintenance agent must be at a stable dose for one month prior to enrollment with no plans by the treating physician to change the dose other than for safety purposestoxicity for the duration of the study through the month 6 visit or early termination. Acceptable maintenance agents include azathioprine, leflunomide, 6-mercaptopurine, methotrexate, mycophenolate mofetil, or mycophenolate sodium. Patients may be on trimethoprimsulfamethoxazole TMPSMX for use as either a maintenance agent or for prophylaxis for infection. TMPSMX may be used in combination with other drugs. 