Please assess the completion status of the following clinical trial:

Trial Title: Melatonin Studies of Totally Blind Children

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

Eligibility Criteria:
Inclusion Criteria:~* Totally blind~* Between 5-8 yrs or 17-20 yrs of age~Exclusion Criteria:~* Pregnancy~* Light perception~* Low melatonin production~* Taking melatonin~* Co-morbid medical disorders (such as seizure disorders)

- Gender: ALL
- Minimum Age: 5 Years
- Maximum Age: 20 Years
- Healthy Volunteers: t

Study Arms:
- Observational (Type: NO_INTERVENTION): Observe to determine free-running versus entrained status.
- Melatonin (Type: EXPERIMENTAL): Subjects with free-running rhythms will take melatonin.

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