S270: LONGER-TERM ANALYSIS OF EFFICACY OF LUSPATERCEPT VERSUS PLACEBO IN PATIENTS WITH TRANSFUSION-DEPENDENT BETA-THALASSEMIA ENROLLED IN THE BELIEVE STUDY.

M. D. Cappellini, A. T. Taher, J. B. Porter, K. H. Kuo, T. D. Coates, E. Voskaridou, G. L. Forni, S. Perrotta, A. Khelif, A. Lal, A. Kattamis, A. Piga, O. Hermine, N. Holot, F. Lersch, J. K. Shetty, S. Vodala, J. Zhang, D. Miteva, V. Viprakasit