Please assess the completion status of the following clinical trial:

Trial Title: A Method to Evaluate Glucose-Dependent Insulin Secretion in Healthy Males (MK-0431-179)

Study Design Characteristics:
- Allocation: RANDOMIZED
- Intervention Model: CROSSOVER
- Observational Model: None
- Primary Purpose: DIAGNOSTIC
- Time Perspective: None
- Masking: DOUBLE
- Phase: PHASE1
- Number of Arms: 3.0

Eligibility Criteria:
Inclusion Criteria:~* Subject is an Asian Indian male between 18 to 45 years of age~* Subject is in good health~* Subject is a nonsmoker or has not used nicotine-containing products for six months~* Subject is willing to avoid strenuous activity~Exclusion Criteria:~* Subject has a history of stroke, seizures, or major neurological disorders~* Subject has irritable bowel disease or recurrent nausea, vomiting, diarrhea, or abdominal pain~* Subject has a history of high blood pressure requiring treatment~* Subject has history of cancer~* Subject has a history of diabetes

- Gender: MALE
- Minimum Age: 18 Years
- Maximum Age: 45 Years
- Healthy Volunteers: t

Study Arms:
- Sitagliptin/Sitagliptin/Placebo (Type: EXPERIMENTAL): Sitagliptin in 2 of 3 treatment periods and Placebo in 1 of 3 treatment periods
- Sitagliptin/Placebo/Sitaglipitin (Type: EXPERIMENTAL): Sitagliptin in 2 of 3 treatment periods and Placebo in 1 of 3 treatment periods
- Placebo/Sitagliptin/Sitagliptin (Type: EXPERIMENTAL): Sitagliptin in 2 of 3 treatment periods and Placebo in 1 of 3 treatment periods

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