RecruitingPhase 1Drug trialTolerability of Ropeginterferon Alfa-2b Add-on to Ongoing Ruxolitinib Therapy in MyelofibrosisThe purpose of this clinical trial is to learn if the study drug ropeginterferon alfa- 2b added to, standard of care, ruxolitinib is safe and effective in treating patients with Myelofibrosis.