- Participants will have further tests on days 3, 7, and 10 after the initial dose of XOMA 052. If the disease remains under good control, participants will have a clinical exam every 5 days for up to 10 weeks until another disease flare occurs (determined either by symptoms or by inflammation observed in laboratory studies). If the disease is not well controlled with the initial dose of XOMA 052, participants will have additional doses starting at day 7 until either the disease is controlled or researchers determine that the medication is not effective.