Please assess the completion status of the following clinical trial:

Trial Title: Study of Recombinant Factor IX Fc Fusion Protein (rFIXFc) in Participants With Hemophilia B

Study Design Characteristics:
- Allocation: NON_RANDOMIZED
- Intervention Model: SINGLE_GROUP
- Observational Model: None
- Primary Purpose: TREATMENT
- Time Perspective: None
- Masking: NONE
- Phase: PHASE3
- Number of Arms: 4.0

Eligibility Criteria:
Inclusion Criteria:~* Male and 12 years of age and older and weigh at least 40 kg~* Diagnosed with hemophilia B (baseline Factor IX level less than or equal to 2%)~* History of at least 100 exposure days to any Factor IX product~* Platelet count ≥100,000 cells/μL~Exclusion Criteria:~* History of Factor IX inhibitors~* Kidney or liver dysfunction~* Diagnosed with another coagulation defect other than hemophilia B~* Prior history of anaphylaxis associated with any Factor IX or intravenous (IV) immunoglobulin administration

- Gender: MALE
- Minimum Age: 12 Years
- Maximum Age: None
- Healthy Volunteers: f

Study Arms:
- Fixed Weekly Interval (Type: EXPERIMENTAL): 50 IU/kg rFIXFc via intravenous (IV) injection once every 7 days initially, then at a dose indicated by the participant's baseline pharmacokinetic (PK) assessment that ensured a target trough of 1% to 3% above baseline or higher, as clinically indicated. Adjustments to the initial weekly dose of rFIXFc (50 IU/kg) were to be made based on baseline PK assessments, occurrence of spontaneous bleeding episodes, and the trough levels, which were to be monitored at Weeks 4, 16, 26, and 39.~Prior to the first dose of rFIXFc, participants in the Sequential PK subgroup were to receive a single dose of 50 IU/kg BeneFIX administered IV in the clinic, followed by PK sampling. A single dose of 50 IU/kg rFIXFc was administered following a 120-hour washout from BeneFIX, followed by PK sampling for a baseline PK profiling. At Week 26 (±1 week) subjects were to receive a single dose of 50 IU/kg rFIXFc for repeat PK profiling.
- Individualized Interval (Type: EXPERIMENTAL): 100 IU/kg rFIXFc via IV injection once every 10 days initially, then at an interval derived from the baseline PK assessment that ensured a target trough of 1% to 3% above baseline or higher, as clinically indicated. Adjustments to the initial 10-day interval were to be made based on baseline PK assessments and trough levels, which were monitored at Weeks 4, 16, 26, and 39.
- On Demand (Type: EXPERIMENTAL): 20 to 100 IU/kg rFIXFc via IV injection, or the dose indicated by the participant's baseline PK to target a plasma level of 20% to 100%, as needed for the treatment of mild to severe bleeding episodes
- Surgery (Type: EXPERIMENTAL): The surgical period and dosing are dependent on the type of surgery the participant undergoes. Participants who started the study in one of the other treatment arms prior to surgery will return to the original treatment arm. Participants who joined the study in the Surgery arm will be assigned to one of the other treatment arms following post-operative rehabilitation.

Based on this trial design, predict the completion outcome and termination type (if applicable).