S292: SUSTAINED RESPONSE OFF TREATMENT IN ELTROMBOPAG-TREATED PATIENTS WITH ITP WHO ARE REFRACTORY OR RELAPSED AFTER FIRST-LINE STEROIDS: PRIMARY ANALYSIS OF THE PHASE II TAPER TRIAL. (23rd June 2022) - Cooper, N.; Ghanima, W.; Vianelli, N.; Valcárcel, D.; Yavaşoğlu, I.; Melikyan, A.; Yañez Ruiz, E.; Haenig, J.; Lee, J.; Maier, J.; Zolkin, N.; Zaja, F.