Please assess the completion status of the following clinical trial:

Trial Title: Sarcosine or D-Serine Add-on Treatment for Chronic Schizophrenia

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

Eligibility Criteria:
Inclusion Criteria:~* Fulfill the criteria of schizophrenia according to the Diagnostic and Statistic Manual, fourth edition (DSM-IV).~* Agree to participate in the study and provide informed consent.~Exclusion Criteria:~* Meet DSM-IV criteria of major mood disorder, current substance dependence or mental retardation~* History of epilepsy, head trauma or CNS diseases~* Major, untreated medical diseases~* Pregnancy or lactation

- Gender: ALL
- Minimum Age: 18 Years
- Maximum Age: 65 Years
- Healthy Volunteers: f

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