P1518: LONG-TERM SAFETY RESULTS OF THE BELIEVE STUDY OF LUSPATERCEPT IN ADULTS WITH ΒETA-THALASSEMIA. (23rd June 2022) - Viprakasit, V.; Cappellini, M. D.; Porter, J. B.; Kuo, K. H. M.; Coates, T. D.; Voskaridou, E.; Pinto, V. M.; Tartaglione, I.; Khelif, A.; Lal, A.; Kattamis, A.; Piga, A.; et al.