Please assess the completion status of the following clinical trial:

Trial Title: Study to Evaluate the Safety and Efficacy of Luspatercept (ACE-536) in Participants With Beta-thalassemia (A536-04/MK-6143-002)

Study Design Characteristics:
- Allocation: NON_RANDOMIZED
- Intervention Model: PARALLEL
- Observational Model: None
- Primary Purpose: TREATMENT
- Time Perspective: None
- Masking: NONE
- Phase: PHASE2
- Number of Arms: 7.0

Eligibility Criteria:
Key Inclusion Criteria:~* Men or women ≥18 years of age~* For the dose escalation phase of the study: documented diagnosis of β-thalassemia intermedia (transfusion dependent participants must not have begun regular transfusions at age \<4.0 years). For the expansion cohort: documented diagnosis of β-thalassemia (including β-thalassemia major or β-thalassemia intermedia)~* Prior splenectomy or spleen size \<18 cm in the longest diameter by abdominal ultrasound (dose escalation cohorts only)~* Anemia, defined as: (1) mean hemoglobin concentration \<10.0 g/dL of 2 measurements (one performed within one day prior to Cycle 1 Day 1 and the other performed during the screening period \[Day -28 to Day -1\]) in non-transfusion dependent participants, defined as having received \< 4 units of RBCs within 8 weeks prior to Cycle 1 Day 1, or (2) transfusion dependent participants, defined as requiring ≥ 4 units of RBCs every 8 weeks (confirmed over 6 months prior to Cycle 1 Day 1)~* Aspartate aminotransferase (AST) or alanine aminotransferase (ALT) \<3 x upper limit of normal (ULN)~* Serum creatinine ≤1.5 x ULN~* Adequate pregnancy avoidance measures~* Participants are able to adhere to the study visit schedule, understand, and comply with all protocol requirements~* Understand and able to provide written informed consent~Key Exclusion Criteria:~* Any clinically significant pulmonary (including pulmonary hypertension), cardiovascular, endocrine, neurologic, hepatic, gastrointestinal, infectious, immunological (including clinically significant allo- or auto-immunization) or genitourinary disease considered by the investigator as not adequately controlled prior to Cycle 1 Day 1~* Folate deficiency~* Symptomatic splenomegaly~* Known positive for human immunodeficiency virus (HIV), active infectious hepatitis B virus (HBV) or active infectious hepatitis C virus (HCV)~* Known history of thromboembolic events ≥Grade 3 according to the National Cancer Institute-Common Terminology Criteria for Adverse Events (NCI-CTCAE) version 4.0 (current active minor version)~* Ejection fraction \<50% by echocardiogram, multi-gated acquisition scan (MUGA), or cardiac magnetic resonance imaging (MRI)~* Uncontrolled hypertension defined as systolic blood pressure (BP) ≥150 mm Hg or diastolic BP ≥95 mm Hg~* Heart failure class 3 or higher (New York Heart Association \[NYHA\])~* QTc \>450 msec on screening electrocardiogram (ECG)~* Platelet count \<100 x10\^9/L or \>1,000 x10\^9/L~* Proteinuria ≥Grade 2~* Any active infection requiring parenteral antibiotic therapy within 28 days prior to Cycle 1 Day 1 or oral antibiotics within 14 days of Cycle 1 Day 1~* Treatment with another investigational drug or device, or approved therapy for investigational use ≤28 days prior to Cycle 1 Day 1, or if the half-life of the previous investigational product is known, within 5 times the half-life prior to Cycle 1 Day 1, whichever is longer~* Transfusion event within 7 days prior to Cycle 1 Day 1~* Participants receiving or planning to receive hydroxyurea treatment. Participants must not have had hydroxyurea within 90 days of Cycle 1 Day 1~* Splenectomy within 56 days prior to Cycle 1 Day 1~* Major surgery (except splenectomy) within 28 days prior to Cycle 1 Day 1. Participants must have completely recovered from any previous surgery prior to Cycle 1 Day 1~* Iron chelation therapy initiated within 56 days prior to Cycle 1 Day 1~* Cytotoxic agents, systemic corticosteroids, immunosuppressants, or anticoagulant therapy such as warfarin or heparin within 28 days prior to Cycle 1 Day 1 (prophylactic aspirin up to 100 mg/day is permitted)~* Pregnant or lactating women~* History of severe allergic or anaphylactic reactions or hypersensitivity to recombinant proteins or excipients in the investigational drug~* Prior treatment with sotatercept (ACE-011) or luspatercept (ACE-536)

- Gender: ALL
- Minimum Age: 18 Years
- Maximum Age: None
- Healthy Volunteers: f

Study Arms:
- Luspatercept 0.2 mg/kg (Type: EXPERIMENTAL): Participants receive luspatercept 0.2 mg/kg as a subcutaneous (SC) injection every 3 weeks (Q3W) on Day 1 of each cycle for up to 5 cycles (each cycle length = 21 days).
- Luspatercept 0.4 mg/kg (Type: EXPERIMENTAL): Participants receive luspatercept 0.4 mg/kg as an SC injection Q3W on Day 1 of each cycle for up to 5 cycles (each cycle length = 21 days).
- Luspatercept 0.6 mg/kg (Type: EXPERIMENTAL): Participants receive luspatercept 0.6 mg/kg as an SC injection Q3W on Day 1 of each cycle for up to 5 cycles (each cycle length = 21 days).
- Luspatercept 0.8 mg/kg (Type: EXPERIMENTAL): Participants receive luspatercept 0.8 mg/kg as an SC injection Q3W on Day 1 of each cycle for up to 5 cycles (each cycle length = 21 days).
- Luspatercept 1.0 mg/kg (Type: EXPERIMENTAL): Participants receive luspatercept 1.0 mg/kg as an SC injection Q3W on Day 1 of each cycle for up to 5 cycles (each cycle length = 21 days).
- Luspatercept 1.25 mg/kg (Type: EXPERIMENTAL): Participants receive luspatercept 1.25 mg/kg as an SC injection Q3W on Day 1 of each cycle for up to 5 cycles (each cycle length = 21 days).
- Expansion Cohort (Type: EXPERIMENTAL): Participants receive an initial dose of luspatercept 0.8 mg/kg as an SC injection on Day 1 of Cycle 1 (Cycle length = 21 days). For each subsequent cycle (up to 5 cycles), the dose was titrated up to a maximum dose of 1.25 mg/kg based on the safety review team (SRT) recommendations.

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

Answer: outcome: complete