Please assess the completion status of the following clinical trial:

Trial Title: Tryptophan Depletion in PD Patients Treated With STN DBS

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

Eligibility Criteria:
Inclusion Criteria:~* subjects must be mentally competent~* subjects must have undergone STN DBS surgery for PD symptomatology~Exclusion Criteria:~* head injury~* stroke~* currentl malignancy or infection~* neurological disorders other than PD~* psychoactive medication: specifically antidepressants and antipsychotics ( a stable dose of benzodiazepines will be allowed)~* clinically relevant cognitive decline, operationalized as a MMSE score \< 24~* current psychiatric syptomatology, operationalized as a Hamilton Depression scale score \> 16 or a score \>2 on one of the MDS-UPDRS section I, items 1-6

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

Study Arms:
- TRP depleted (Type: EXPERIMENTAL): TRP depleted protein drink
- Placebo (Type: PLACEBO_COMPARATOR): Balanced protein drink (+1.21g of TRP)

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