Please assess the completion status of the following clinical trial:

Trial Title: Physiologic Comparison Between NIV-NAVA and PS in Preterm Infants

Study Design Characteristics:
- Allocation: RANDOMIZED
- Intervention Model: CROSSOVER
- Observational Model: None
- Primary Purpose: TREATMENT
- Time Perspective: None
- Masking: NONE
- Phase: PHASE2/PHASE3
- Number of Arms: 2.0

Eligibility Criteria:
Inclusion Criteria:~* preterm infants less than 32 weeks of gestational age~* intubated more than 48 hours after birth~* subjected to extubation with minimal ventilator setting (mean airway pressure \< 7cmH2O + peak inspiratory pressure \< 13 cmH2O + FiO2 \< 0.4 + respiratory rate \< 35/min)~* with informed consent from parents~Exclusion Criteria:~* with major congenital anomalies~* use of sedative or anesthetic drugs~* hemodynamic instability~* grade 3 or higher intraventricular hemorrhage~* phrenic nerve palsy

- Gender: ALL
- Minimum Age: 3 Days
- Maximum Age: 3 Months
- Healthy Volunteers: f

Study Arms:
- NAVA-PS (Type: EXPERIMENTAL): noninvasive NAVA first for 15 minutes and then PSV for 15 minutes
- PS-NAVA (Type: EXPERIMENTAL): noninvasive PSV first for 15 minutes and then NAVA for 15 minutes

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