P999: ROLE OF GENETIC VARIANTS IN PREDICTING EFFICACY AND/OR ADVERSE EVENTS OF ROPEGINTERFERON ALPHA-2B IN MPN PATIENTS: A RETROSPECTIVE ANALYSIS FROM AN ASIAN COHORT - Chih-Cheng Chen; Ming-Chung Kuo; Ying-Hsuan Wang; Sung-Nan Pei; Ming-Lih Huang; Chiu-Chen Chen; Cih-En Huang; Yi-Yang Chen; Lee-Yung Shih (HemaSphere, 2023)