Please assess the completion status of the following clinical trial:

Trial Title: PSIL201 Long-term Follow-up Study: Psilocybin or Niacin / Major Depressive Disorder

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

Eligibility Criteria:
Inclusion Criteria:~* Enrollment and intervention with the investigational drug in Study PSIL201~Exclusion Criteria:~* Inability or unwillingness to complete study procedures, including regular completion of web surveys and telephone interviews with study personnel

- Gender: ALL
- Minimum Age: 21 Years
- Maximum Age: 65 Years
- Healthy Volunteers: f

Study Arms:
- Single-Dose of Psilocybin (Type: None): None
- Niacin-Control (Type: None): None

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