Please assess the completion status of the following clinical trial:

Trial Title: The Effects of Ketamine and Methadone on Postoperative Pain for Laminectomy

Study Design Characteristics:
- Allocation: RANDOMIZED
- Intervention Model: PARALLEL
- Observational Model: None
- Primary Purpose: TREATMENT
- Time Perspective: None
- Masking: QUADRUPLE
- Phase: PHASE4
- Number of Arms: 3.0

Eligibility Criteria:
Inclusion Criteria:~• 18 - 80 years old of either gender, scheduled for elective lumbar laminectomy~Exclusion Criteria:~* American Society of Anesthesiologists (ASA) IV and above~* Intolerance, allergy, or contraindication to use of any medications used in this study~* Significant coronary artery disease (abnormal stress test, myocardial infarction~  * within the last 3 months)~* Increased intraocular pressure (e.g., untreated glaucoma)~* Uncontrolled hypertension (BP \> 140/90)~* Sleep apnea and currently on continuous positive airway pressure (CPAP)~* Increased intracranial pressure or clinical signs thereof~* History of intracranial surgery, stroke, or brain aneurysm~* Cardiac arrhythmias particularly prolonged QT syndrome~* Drugs known to cause prolonged qT: class (IA) antiarrhythmics (quinidine, procainamide, disopyramide), class III antiarrhythmics (sotalol, dofetilide, ibutilide, amiodarone), haloperidol, thioridazine, arsenic trioxide, HIV protease inhibitors, tricyclic antidepressants~* Individuals with significant psychological disorders including: schizophrenia, mania, bipolar disorder or psychosis~* Pregnant or lactating women~* Emergent laminectomy~* Those already receiving ketamine or methadone prior to surgery~* Morbid obesity (BMI \> 40 kg/m2) AND/OR weight \> 150 kg~* Chronic renal failure ( creatinine \> 2.0 mg/dL)~* Liver failure e.g., active cirrhosis~* Alcohol or substance abuse within in the past 3 months~* Uncorrected hypokalemia, hypomagnesemia, hypocalcemia (can be due to diuretics, mineralocorticoid use, laxatives)~* Chronic obstructive pulmonary disease (COPD)/Hypercarbia~* Restrictive lung disease (pulmonary fibrosis, myasthenia gravis)~* Congestive heart failure~* Thyroid disease~* Organ transplant patients~* Drugs/substances known to inhibit methadone metabolism: macrolide antibiotics e.g., erythromycin, cimetidine, astemizole, voriconazole, grapefruit juice

- Gender: ALL
- Minimum Age: 18 Years
- Maximum Age: 80 Years
- Healthy Volunteers: f

Study Arms:
- Ketamine (Type: ACTIVE_COMPARATOR): A bolus of intravenous (IV) ketamine during induction (0.5mg/kg), and an IV infusion of ketamine intraoperatively (5 mcg/kg/min))
- Methadone (Type: ACTIVE_COMPARATOR): Will receive a single dose of IV methadone (0.2 mg/kg) preinduction
- Ketamine + methadone (Type: EXPERIMENTAL): Methadone (0.2 mg/kg) preinduction, a bolus of IV ketamine (0.5 mg/kg) during induction and IV ketamine infusion intraoperatively (5 mcg/kg/min)

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