Please assess the completion status of the following clinical trial:

Trial Title: Airway Protective Mechanisms in PD (R01)

Study Design Characteristics:
- Allocation: None
- Intervention Model: None
- Observational Model: CASE_CONTROL
- Primary Purpose: None
- Time Perspective: PROSPECTIVE
- Masking: None
- Phase: None
- Number of Arms: None

Eligibility Criteria:
Inclusion Criteria:~1. Between the ages of 45 and 85 years~2. Diagnosis of PD, Hoehn and Yahr stages I - IV, by a fellowship trained neurologist arriving at the diagnosis of PD by applying strict UK brain bank criteria (PD participants only)~Exclusion Criteria:~1. Neurological disorders other than PD (i.e., stroke, etc.)~2. Difficulty complying due to neuropsychological dysfunction (i.e., severe depression)~3. Allergy to capsaicin or hot peppers~4. History of head or neck cancer~5. History of smoking in the past 5 years~6. Any neurological disorder including PD (Healthy control group only)

- Gender: ALL
- Minimum Age: 45 Years
- Maximum Age: 85 Years
- Healthy Volunteers: None

Study Arms:
- Healthy controls (Type: None): Men and women between the ages of 45 and 85 years without Parkinson's disease, or any history of neurologic disorder/disease, head or neck cancer, or chronic respiratory illness.
- Parkinson's disease (Type: None): Men and women between the ages of 45 and 85 years with Parkinson's disease, and without any history of neurologic disorder/disease, head or neck cancer, or chronic respiratory illness.

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