Please assess the completion status of the following clinical trial:

Trial Title: Development of Cocktail for Measuring the Activity of Important Cytochrome P450 Enzymes

Study Design Characteristics:
- Allocation: NON_RANDOMIZED
- Intervention Model: CROSSOVER
- Observational Model: None
- Primary Purpose: SCREENING
- Time Perspective: None
- Masking: NONE
- Phase: None
- Number of Arms: 3.0

Eligibility Criteria:
Inclusion Criteria:~* Healthy volunteers,~* Written consent, AND~* Age 18-65 years old.~Exclusion Criteria:~* Daily medication,~* Alcohol abuse,~* Pregnancy, OR~* Breastfeeding.

- Gender: ALL
- Minimum Age: 18 Years
- Maximum Age: 65 Years
- Healthy Volunteers: t

Study Arms:
- Tramadol (Type: ACTIVE_COMPARATOR): CYP2D6 metric
- Omeprazole, losartan, caffeine (Type: ACTIVE_COMPARATOR): CYP2C19, CYP2C9 and CYP1A2 metrics
- Tramadol, omeprazole, losartan and caffeine (Type: ACTIVE_COMPARATOR): CYP2D6, CYP2C19, CYP2C9 and CYP1A2 metrics

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