Please assess the completion status of the following clinical trial:

Trial Title: Melatonin for Circadian Sleep Disorders in the Blind

Study Design Characteristics:
- Allocation: NON_RANDOMIZED
- Intervention Model: FACTORIAL
- Observational Model: None
- Primary Purpose: TREATMENT
- Time Perspective: None
- Masking: SINGLE
- Phase: None
- Number of Arms: 5.0

Eligibility Criteria:
Inclusion criteria:~* blindness for at least one year, verified by an ophthalmologic exam~* ability to comply with the requirements of the experimental protocol~* competency to sign informed consent~Exclusion criteria (as determined by medical history and/or physical examination):~* abnormal heart, liver or kidney function~* a current Axis I psychiatric or substance abuse disorder according to the DSM-IV Manual~* possibly external demands that limit the ability to maintain a regular schedule (e.g., night shift work)~* sexually active female subjects of child-bearing potential will be asked to avoid pregnancy using accepted methods and will be notified that the effects of melatonin on a fetus are not known (we will ask subjects monthly if they are pregnant or trying to become pregnant)~* if a subject reports she is pregnant or is trying to become pregnant anytime during her study participation, any study medications (melatonin or placebo) will be immediately withdrawn and the subject will be excluded from the study

- Gender: ALL
- Minimum Age: 18 Years
- Maximum Age: 100 Years
- Healthy Volunteers: f

Study Arms:
- Baseline (Type: NO_INTERVENTION): None
- Melatonin (Type: EXPERIMENTAL): Subjects will be administered melatonin.
- Light (Type: EXPERIMENTAL): None
- Regular Sleep Schedule (Type: EXPERIMENTAL): None
- Longitudinal Monitoring (Type: NO_INTERVENTION): Optional longitudinal study, an extension of the first study stage, for subjects whose rhythms are not clearly free-running.

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