Please assess the completion status of the following clinical trial:

Trial Title: The Aging Endocrine Pancreas: Characterization of the Entero-insular Axis Physiology in the Elderly

Study Design Characteristics:
- Allocation: None
- Intervention Model: None
- Observational Model: CASE_CONTROL
- Primary Purpose: None
- Time Perspective: CROSS_SECTIONAL
- Masking: None
- Phase: None
- Number of Arms: None

Eligibility Criteria:
Inclusion Criteria:~* Stable weight (\< 5% variation) within the last three months~* Age: 35 to 50 years old for middle-age group, and 65 to 80 years old for elderly group.~* BMI: 20 to 29.9 kg/m2~* Normal glucose tolerance (NGT) for groups Elderly and Middle-age~Exclusion Criteria:~* Use of estrogen, progestogen or systemic corticosteroids.~* Hepatic cirrhosis, renal failure or any clinical condition with impaired insulin sensitivity~* Smoking~* Obesity~* Uncontrolled systemic or debilitating diseases

- Gender: ALL
- Minimum Age: 35 Years
- Maximum Age: 80 Years
- Healthy Volunteers: t

Study Arms:
- Elderly NGT (Type: None): Normoglycemic subjects 65-80 years old
- Middle-age NGT (Type: None): Middle-age normoglycemic subjects 35 to 50 years old.

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