Overview Phase I/IIa Study of FIXFc in Hemophilia B Patients Status: Completed Trial end date: 2009-10-01 Target enrollment: Participant gender: Summary The primary objective of the study is to assess safety of FIXFc at doses ranging from 1 to 100 IU/kg. Phase: Phase 1 Details Lead Sponsor: BiogenBioverativ Therapeutics Inc.Collaborators: Swedish Orphan BiovitrumSyntonix Pharmaceuticals, Inc.