Please assess the completion status of the following clinical trial:

Trial Title: Modulation of GABA-A Receptors in Parkinson Disease-Flumazenil Arm

Study Design Characteristics:
- Allocation: RANDOMIZED
- Intervention Model: CROSSOVER
- Observational Model: None
- Primary Purpose: OTHER
- Time Perspective: None
- Masking: TRIPLE
- Phase: PHASE1/PHASE2
- Number of Arms: 2.0

Eligibility Criteria:
Inclusion Criteria:~1. Parkinson's disease (PD): PD diagnosis will follow the UK Parkinson's Disease Society Brain Bank Research Center (UKPDSBRC) clinical diagnostic criteria for PD.~2. Hoehn and Yahr stages 2-4~3. Absence of dementia confirmed by cognitive testing.~4. Abnormal 11C-Dihydrotetrabenazine (\[11C\]-DTBZ) PET study to demonstrate nigrostriatal dopaminergic denervation.~Exclusion Criteria:~1. PD with Dementia (PDD) or dementia with Lewy bodies (DLB).~2. Other disorders which may resemble PD, such as vascular dementia, normal pressure hydrocephalus, multiple system atrophy, corticobasal ganglionic degeneration, or toxic causes of parkinsonism. Prototypical cases have distinctive clinical profiles, like early and severe dysautonomia or appendicular apraxia, which may differentiate them from idiopathic PD. The use of the UKPDSBRC clinical diagnostic criteria for PD will mitigate the inclusion of subjects with atypical parkinsonism.~3. Subjects on benzodiazepine, GABA-ergic medications (baclofen, tizanidine), neuroleptic, anticholinergic (trihexyphenidyl, benztropine), or cholinesterase inhibitor drugs.~4. Evidence of a mass lesion on structural brain imaging (MRI).~5. Participants in whom MRI is contraindicated including, but not limited to, those with a pacemaker, presence of metallic fragments near the eyes or spinal cord, chest, or cochlear implant.~6. Severe claustrophobia precluding MR or PET imaging.~7. Subjects limited by participation in research procedures involving ionizing radiation.~8. Pregnancy (urine or serum pregnancy test within 48 hours of each PET session) or breastfeeding.~9. History of seizures~10. Significant anxiety or history of panic disorder.~11. History of recent suicide attempt or overdose of tricyclic antidepressants or other medications~12. Any other medical history determined by investigators to preclude safe participation.~13. Allergy to flumazenil~14. Significant liver disease~15. History of alcohol or other substance abuse within past two years.~16. History of regular benzodiazepine use within past year

- Gender: ALL
- Minimum Age: 50 Years
- Maximum Age: 99 Years
- Healthy Volunteers: f

Study Arms:
- Sequence A - (Flumazenil at Visit 1) (Type: EXPERIMENTAL): A detailed 90 minute clinical assessment was conducted before and after treatment administration for each visit. Flumazenil 1mg in 10cc normal saline was given intravenously (iv) over 5-10 minutes on the first visit as treatment. 10 cc of normal saline placebo was given intravenously (iv) over 5-10 minutes on the second visit as treatment.
- Sequence B - (Placebo at Visit 1) (Type: EXPERIMENTAL): A detailed 90 minute clinical assessment was conducted before and after treatment administration for each visit. 10 cc of normal saline placebo was given intravenously (iv) over 5-10 minutes on the first visit as treatment. Flumazenil 1mg in 10cc normal saline was given intravenously (iv) over 5-10 minutes on the second visit as treatment.

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