Please assess the completion status of the following clinical trial:

Trial Title: The Addition of Non-Invasive Ventilation To Airway Clearance Techniques In Adults With Cystic Fibrosis

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

Eligibility Criteria:
Inclusion Criteria:~* Diagnosis of cystic fibrosis (confirmed by genotype or a sweat sodium concentration of \>70mmol/l or sweat chloride of \>60mmol/l)~* Sixteen years of age or over~* Patients admitted to the Royal Brompton Hospital with a pulmonary exacerbation of which is resolving. Patients will be considered for inclusion from day 7 of treatment to 3 days prior to discharge (as determined by a member of the cystic fibrosis medical team and have spirometric values within 20% of the mean of the last two stable recordings (at least 1 month apart)~* Patients with an established airway clearance regime that they have used for 3 months or more~Exclusion Criteria:~* Current moderate haemoptysis (greater than streaking in the sputum)~* Current pneumothorax or history of pneumothorax in the 3 months prior to consideration for the study~* Current dependency on positive pressure support with airway clearance via the IPPB (Intermittent Positive Pressure Breathing) machine or NIV~* Previous history of spontaneous rib fractures~* Pregnancy~* Inability to give consent for treatment or measurement~* Current participation in another study~* If the patient requires more than 2 airway clearance sessions a day

- Gender: ALL
- Minimum Age: 16 Years
- Maximum Age: None
- Healthy Volunteers: f

Study Arms:
- Normal airway clearance (Type: EXPERIMENTAL): The patients usual airway clearance technique
- Non-Invasive Ventilation (Type: EXPERIMENTAL): The addition of positive pressure via a non-invasive ventilator to the participants usual airway clearance technique

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