Please assess the completion status of the following clinical trial:

Trial Title: Use of Varenicline for 4-weeks Prior to Quitting

Study Design Characteristics:
- Allocation: RANDOMIZED
- Intervention Model: PARALLEL
- Observational Model: None
- Primary Purpose: TREATMENT
- Time Perspective: None
- Masking: TRIPLE
- Phase: PHASE3
- Number of Arms: 2.0

Eligibility Criteria:
Inclusion Criteria:~* Smokers seeking treatment~* Aged 18 and over~* Consenting to take part in the trial~Exclusion Criteria:~* Pregnant or breastfeeding~* End-stage renal disease~* Used varenicline in the past 6 months~* Unable to fill in questionnaires in English~* Current psychiatric illness~* Current serious illness including uncontrolled hypertension and recent cardiac event~* Sensitivity to varenicline currently enrolled in other research projects.

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

Study Arms:
- Varenicline pre-treatmemt (Type: EXPERIMENTAL): Participants will use varenicline (1mg BD) 4-weeks prior to quitting
- Placebo (Type: PLACEBO_COMPARATOR): Participants will use 3 weeks of placebo, followed by 1 week of varenicline, prior to quitting

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