Please assess the completion status of the following clinical trial:

Trial Title: ScanBrit Dietary Intervention in Autism

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

Eligibility Criteria:
Inclusion Criteria:~* Autism Spectrum Disorder (ASD)~* Diagnosis received at Centre for Autism or a psychiatric clinic~* Abnormal urinary peptide profile~Exclusion Criteria:~* Medical treatment~* Epilepsy

- Gender: ALL
- Minimum Age: 4 Years
- Maximum Age: 11 Years
- Healthy Volunteers: f

Study Arms:
- Gluten- and casein-free diet (Type: EXPERIMENTAL): Stage 1: Gluten- and casein-free dietary intervention for first 8 or 12 months. 8 or 12 months: Interim analysis based on surpassing statistical thresholds. If showed group significant improvements then progressed to stage 2 (continued on a gluten- and casein-free diet for a further 12 months).
- No dietary intervention (Type: NO_INTERVENTION): Stage 1: No special dietary intervention for first 8 or 12 months. 8 or 12 months: Interim analysis based on surpassing statistical thresholds. If gluten- and casein-free dietary group showed group significant improvements then progressed to stage 2 (introduction of a gluten- and casein-free diet for 12 months).

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