Please assess the completion status of the following clinical trial:

Trial Title: Role of Endorphins in the Perception of Dyspnea in Patients With Chronic Obstructive Pulmonary Disease

Study Design Characteristics:
- Allocation: RANDOMIZED
- Intervention Model: CROSSOVER
- Observational Model: None
- Primary Purpose: DIAGNOSTIC
- Time Perspective: None
- Masking: TRIPLE
- Phase: None
- Number of Arms: 1.0

Eligibility Criteria:
Inclusion Criteria:~* Diagnosis of COPD~* Ability to exercise~* Ability to computer mouse to provide ratings~* \> 10 pack-years smoking~* Baseline dyspnea index \< 9~Exclusion Criteria:~* Clinically significant comorbidities

- Gender: ALL
- Minimum Age: 50 Years
- Maximum Age: 90 Years
- Healthy Volunteers: f

Study Arms:
- A: naloxone; B: normal saline (Type: PLACEBO_COMPARATOR): Arm A: IV naloxone Arm B: IV normal saline

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