P1641: ELTROMBOPAG TREATMENT, OUTCOMES AFTER DISCONTINUATION IN ADULT PATIENTS WITH PRIMARY IMMUNE THROMBOCYTOPENIA, AND EXPLORATION OF POTENTIAL PREDICTIVE FACTORS: A REAL-WORLD CLINICAL EXPERIENCE. (23rd June 2022) - Liu, X.; Fu, R.; Li, H.; Chen, Y.; Liu, W.; Xue, F.; Zhang, L.; Yang, R.