Patients were eligible for inclusion if they developed grade 3-4 hepatic and/or GI GVHD unresponsive to treatment with IV cyclosporin 3 mg/kg and IV methylprednisolone (MP) 2 mg/kg. GVHD diagnosis was based upon clinical criteria and in some of the patients supported by biopsy. GVHD grading was graded according to the Seattle severity index.