Please assess the completion status of the following clinical trial:

Trial Title: D-serine for Posttraumatic Stress Disorder Treatment

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

Eligibility Criteria:
Inclusion Criteria:~• Chronic PTSD (DSM-IV diagnosis)~Exclusion Criteria:~* Other psychiatric diagnosis~* Substance abuse~* Unstable medical condition

- Gender: ALL
- Minimum Age: 25 Years
- Maximum Age: 75 Years
- Healthy Volunteers: f

Study Arms:
- 1 (Type: PLACEBO_COMPARATOR): Adjuvant 6 weeks treatment with placebo (\~2g /day)
- 2 (Type: EXPERIMENTAL): Adjuvant 6 weeks treatment with D-serine (\~2g /day)

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