Please assess the completion status of the following clinical trial:

Trial Title: Effect of Non-Invasive Ventilation in Cystic Fibrosis Patient With Chronic Respiratory Failure.

Study Design Characteristics:
- Allocation: RANDOMIZED
- Intervention Model: PARALLEL
- Observational Model: None
- Primary Purpose: TREATMENT
- Time Perspective: None
- Masking: NONE
- Phase: PHASE4
- Number of Arms: 2.0

Eligibility Criteria:
Inclusion Criteria:~* Confirmed diagnosis of Cystic fibrosis~* Chronic hypercapnia on room air in stable condition (PaCO2 between 45 and 55mmHg in two occasions separated by more than 4 weeks)~* Informed consent~Exclusion Criteria:~* Current treatment with non-invasive ventilation~* PaCO2 more than 55 mmHg~* Recent pneumothorax (within past 3 months)

- Gender: ALL
- Minimum Age: 18 Years
- Maximum Age: None
- Healthy Volunteers: f

Study Arms:
- Usual medical therapy (Type: NO_INTERVENTION): Usual CF care
- Non-invasive ventilation (Type: EXPERIMENTAL): Pressure support ventilator (SAIME,AIROX)

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