Please assess the completion status of the following clinical trial:

Trial Title: A Brain Imaging Study of Nicotine Release in Cigarette Smokers

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

Eligibility Criteria:
Inclusion Criteria:~* Chronic smokers and healthy non-smokers.~Exclusion Criteria:~* Pregnant and breast feeding women.~* Age below 20.~* Neurological disorders.~* Others drugs.

- Gender: ALL
- Minimum Age: 20 Years
- Maximum Age: 65 Years
- Healthy Volunteers: t

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