Please assess the completion status of the following clinical trial:

Trial Title: Effects of Dipeptidyl Peptidase-4 (DPP-4) Inhibition on Hormonal Responses to Macronutrient Ingestion

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

Eligibility Criteria:
Inclusion Criteria:~* Healthy men~* Age 20-30 years~* BMI 20-30 kg/m2~Exclusion Criteria:~* Any disease~* Any medication

- Gender: MALE
- Minimum Age: 20 Years
- Maximum Age: 30 Years
- Healthy Volunteers: t

Study Arms:
- Placebo (Type: PLACEBO_COMPARATOR): A placebo tablet is given before ingestion of macronutrients
- Sitagliptin (Type: ACTIVE_COMPARATOR): Sitagliptin is given before ingestion of macronutrients

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