Please assess the completion status of the following clinical trial:

Trial Title: A Randomized Study of Iodine-131 Anti-b1 Antibody Versus Anti-b1 Antibody in Chemotherapy-relapsed/Refractory Low-grade or Transformed Low-grade Non-Hodgkin's Lymphoma (NHL)

Study Design Characteristics:
- Allocation: RANDOMIZED
- Intervention Model: CROSSOVER
- Observational Model: None
- Primary Purpose: TREATMENT
- Time Perspective: None
- Masking: NONE
- Phase: PHASE2
- Number of Arms: 2.0

Eligibility Criteria:
Inclusion Criteria:~* Histologically confirmed low-grade or transformed NHL with evaluable, measurable disease~* Tumor had to express CD20 antigen~* One to three prior chemotherapy regimens~* Karnofsky performance score ≥60% and anticipated survival ≥3 months~* Absolute neutrophil count (ANC) \>1500/mm3 and platelet count \>100,000/mm3~* Adequate renal and hepatic function~* 18 years of age or older.~* Written informed consent and sign an IRB-approved Informed consent from prior to study entry.~Exclusion Criteria:~* More than an average of 25% of the intratrabecular marrow space involved by lymphoma in bone marrow biopsy specimens as assessed microscopically within 42 days of study entry. Bilateral posterior iliac crest core biopsies are required if the percentage of intratrabecular space involved exceeds 10% on a unilateral biopsy. The mean of bilateral biopsies must be no more than 25%.~* Received cytotoxic chemotherapy, radiation therapy, immunosuppressants, or cytokine treatment within FOUR weeks prior to study entry (6 weeks of nitrosourea compounds) or who exhibit persistent clinical evidence of toxicity. The use of steroids must be discontinued at least 1 week prior to study entry.~* Have undergone prior stem cell transplant.~* Active obstructive hydronephrosis.~* Evidence of active infection requiring intravenous antibiotics at the time of study entry.~* New York Heart Association class III or IV heart disease or other serious illness that would preclude evaluation.~* Prior malignancy other than lymphoma, except for adequately-treated skin cancer, in situ cervical cancer, or other cancer for which subject has been disease-free for 5 years.~* Known HIV infection.~* Known brain or leptomeningeal metastases.~* Pregnant or nursing. Subjects of childbearing potential must undergo pregnancy test within 7 days of study entry and antibody is not to be administered until a negative result is obtained. For those subjects in Arm B, the pregnancy test must be repeated within 7 days of crossover. Male and female must agree to use effective contraception for 6 months following the therapeutic dose, as applicable.~* Previous allergic reactions to iodine. This does not include reactions to intravenous iodine-containing contrast materials.~* Previously given any monoclonal or polyclonal antibodies of any non-human species for either diagnostic or therapeutic purpose. This includes engineered chimeric and humanized antibodies.~* Previously received radioimmunotherapy .~* Progressive disease within one year of irradiation arising in a field that has been previously irradiated with \>3500 cGy.~* de novo intermediate or high-grade lymphoma.~* Received \>3 chemotherapy regimens (different or identical agents).

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

Study Arms:
- Open-label, two-arm, Arm A and Arm B Crossover (Type: EXPERIMENTAL): Arm A Dosimetric Dose: 450 mg of TST infused over 70 minutes (inclusive of a 10-minute flush) immediately followed by 5 milliCurie (mCi) (35 mg) of I-131 TST infused over 30 minutes (inclusive of a 10-minute flush).• Therapeutic Dose: Seven to 14 days after the dosimetric dose, 450 mg of TST infused over 70 minutes (inclusive of a 10-minute flush) immediately followed by a subject-specific mCi activity (35 mg) of I-131 TST to deliver the desired total body dose (TBD) infused over 30 minutes (inclusive of a 10-minute flush). The desired TBD was 65 cGy for subjects with a baseline platelet count of 100,001-149,999 cells/mm3 and 75 cGy for subjects with a baseline platelet count ≥150,000 cells/mm3. Obese subjects (subjects weighing more than 137% of their calculated lean body weight) were dosed based upon 137% of their calculated lean body mass
- Arm B Crossover (Type: EXPERIMENTAL): Arm B Dosimetric Dose: 450 mg of TST infused over 70 minutes (inclusive of a 10-minute flush) immediately followed by 35 mg of TST infused over 30 minutes (inclusive of a 10-minute flush).Therapeutic Dose: Seven to 14 days after the dosimetric dose, 450 mg of TST infused over 70 minutes (inclusive of a 10-minute flush) immediately followed by 35 mg of TST infused over 30 minutes (inclusive of a 10-minute flush). Subjects randomized to Arm B were allowed to cross-over and receive TST/ I-131 TST once their disease had progressed.

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

Answer: outcome: complete