In Phase A, individuals will get unique doses and schedules of oral ABBV-744 pill to recognize safe dosing regimen. Added contributors will likely be enrolled within the identified monotherapy dosign routine. In Phase B, participants will obtain oral ruxolitinib and ABBV-744 might be given as "incorporate-on" therapy. In Section C, https://abbv-744brd4inhibitorcanc57923.spintheblog.com/32408467/clinical-trial-recruitment-for-abbv-744-study-fundamentals-explained