Please assess the completion status of the following clinical trial:

Trial Title: Organic Cation Transporter 1 (OCT1), on Response to Metformin in Healthy Subjects

Study Design Characteristics:
- Allocation: NON_RANDOMIZED
- Intervention Model: PARALLEL
- Observational Model: None
- Primary Purpose: None
- Time Perspective: None
- Masking: NONE
- Phase: PHASE4
- Number of Arms: 2.0

Eligibility Criteria:
Inclusion Criteria:~* Previous participation in the Study Of Pharmacogenetics In Ethnically Diverse Populations (SOPHIE) study.~* Between the ages of 18 and 40.~* Possess a specific OCT1 genotype.~Exclusion Criteria:~* Taking any medications other than vitamins~* Individuals with anemia (hemoglobin \< 12 g/dL), an elevation in liver enzymes to higher than double the respective normal value, or elevated creatinine concentrations (males ≥ 1.5 mg/dL, females ≥ 1.4 mg/dL)~* Pregnant at time of study.

- Gender: ALL
- Minimum Age: 18 Years
- Maximum Age: 40 Years
- Healthy Volunteers: t

Study Arms:
- OCT1-variant Group (Type: EXPERIMENTAL): Subjects with OCT1-variant alleles will be dosed with 2 doses of Metformin
- OCT1-reference Group (Type: EXPERIMENTAL): Subjects with OCT1-reference alleles will be dosed with 2 doses of Metformin

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