What immunosuppressive agents aside from steroids would you use to treat bronchiolitis obliterans in a patient with long-standing seropositive RA?

There is little doubt that bronchiolitis obliterans can be a devastating lung disease. Corticosteroids remain the primary anchor therapy, however, virtually all patients will require an additional agent. Rituximab has become the primary choice and there is evidence, though mostly anecdotal, that it can slow progression or at the least, stabilize disease activity. It has the benefit of bringing a useful treatment of the accompanying arthritis that is often severe. However, there are several repor...