Please assess the completion status of the following clinical trial:

Trial Title: Functional Magnetic Resonance Imaging of ATP Cough in Chronic Cough Patients

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

Eligibility Criteria:
Inclusion Criteria:~* Patients with physician diagnosed chronic refractory cough (cough lasting \>8 weeks).~* \> 18 years of age~* Must be cognitively impaired~Exclusion Criteria:~* People with contraindications to MRI scanning (i.e. metal implants, claustrophobia).~* History of uncontrolled asthma or chronic respiratory disease (other than refractory cough).~* Evidence of an allergic reaction to capsaicin (chilli).~* Pregnant women.~* Smoking, current or recent history (last 6 months).

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

Study Arms:
- Chronic cough participant (Type: EXPERIMENTAL): Twenty-five (25) Idiopathic chronic cough patients, defined as refractory to disease modifying therapies (eg anti-asthma medications), will be recruited.~Participants will attend two sessions. In the first they will inhale in a single breath a nebulized solutions of increasing doses of Adenosine Triphosphate (ATP; 0.2-300 milliM) and capsaicin (0.5-125 microM) to determine their individual cough and urge-to-cough thresholds. In the second session, participants will undergo functional brain imaging (fMRI) for 1 hour while inhaling over 24 seconds randomly administered nebulized solutions of saline, or threshold doses of ATP or capsaicin.
- Healthy control participant (Type: EXPERIMENTAL): Twenty-five (25) appropriately age and sex matched healthy non-smoking individuals will be recruited as the comparison group.~Participants will attend two sessions. In the first they will inhale in a single breath a nebulized solutions of increasing doses of ATP (0.2-300 milliM) and capsaicin (0.5-125 microM) to determine their individual cough and urge-to-cough thresholds. In the second session, participants will undergo fMRI for 1 hour while inhaling over 24 seconds randomly administered nebulized solutions of saline, or threshold doses of ATP or capsaicin.

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