“…To date, the efficacy of CS, CY and CsA for patients with primary or secondary PRCA has been reported to be between 30 and 62, 7 and 20, 65 and 87 %, respectively [4] (Table 1). More recently, the efficacies of the anti-CD20 monoclonal antibody, rituximab, and anti-CD52 monoclonal antibody, alemtuzumab to induce remissions of therapy-resistant PRCA have also been reported [5,6].…”