Please assess the completion status of the following clinical trial:

Trial Title: Does Switching to Nicotine Containing Electronic Cigarettes Reduce Health Risk Markers

Study Design Characteristics:
- Allocation: RANDOMIZED
- Intervention Model: PARALLEL
- Observational Model: None
- Primary Purpose: OTHER
- Time Perspective: None
- Masking: QUADRUPLE
- Phase: None
- Number of Arms: 2.0

Eligibility Criteria:
Inclusion Criteria:~* Age 21 to 70~* Smoke ≥5 cigarettes per day for at least the past 12 months~* Smoke regular, filtered cigarettes or machine-rolled cigarettes with a filter~* Exhaled CO measurement ≥6 ppm at baseline visit~* No serious quit attempt in prior month~* Willing to completely cease cigarette consumption and switch to an e-cig~* Willing and able to attend regular visits over a 7-week period~* Able to read and write in English~* Able to understand and consent to study procedures~Exclusion Criteria:~* Unstable or significant medical condition such as COPD, kidney disease, or liver disease in the past 12 months~* Severe immune system disorders~* Women who are pregnant, trying to become pregnant, or nursing~* Use of any non-cigarette nicotine delivery product in the past 7 days~* Use of an e-cig for 5 or more days in the past 28 days or any use in the past 7 days~* Uncontrolled mental illness or substance abuse or inpatient treatment for these conditions in the past 6 months~* History of a seizure disorder or had a seizure in the past 12 months~* Currently or have ever taken medications prescribed to prevent seizures (such as Carbamazepine or Phenobarbital). Using seizure medications for off-label use (indications other than treatment for seizures) will not be included as an exclusion, these will be assessed on a case-by-case basis.~* History of difficulty providing or unwilling to provide blood samples (fainting, poor veins, anxiety, seizures)~* Surgery requiring general anesthesia in the past 6 weeks~* Use of marijuana or any illicit drug/prescription drugs for non-medical use daily/almost daily or weekly in the past 3 months per NIDA Quick Screen~* Use of hand-rolled, roll your own cigarettes~* Known allergy to propylene glycol or vegetable glycerin~* Other member of household currently participating in the study

- Gender: ALL
- Minimum Age: 21 Years
- Maximum Age: 70 Years
- Healthy Volunteers: t

Study Arms:
- Nicotine-Containing Electronic Cigarette (Type: EXPERIMENTAL): The experimental group will be provided with and encouraged to use a Standardized Research Electronic Cigarette (SREC) with liquid containing 58 mg/ml nicotine for the duration of 6 weeks.
- Non-Nicotine Electronic Cigarette (Type: PLACEBO_COMPARATOR): The placebo group will be provided with and encouraged to use a Standardized Research Electronic Cigarette (SREC) with liquid containing 0 mg/ml nicotine for the duration of 6 weeks.

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